{"id":366091,"date":"2025-01-17T12:20:22","date_gmt":"2025-01-17T17:20:22","guid":{"rendered":"https:\/\/www.1stdibs.com\/blogs\/the-study\/?p=366091"},"modified":"2025-01-17T12:20:35","modified_gmt":"2025-01-17T17:20:35","slug":"how-to-spot-a-fake-diamond","status":"publish","type":"post","link":"https:\/\/www.1stdibs.com\/blogs\/the-study\/how-to-spot-a-fake-diamond\/","title":{"rendered":"How to Spot a Fake Diamond"},"content":{"rendered":"<div class=\"wp-block-image is-resized\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.1stdibs.com\/art\/prints-works-on-paper\/still-life-prints-works-on-paper\/richard-bernstein-diamond-ring-richard-bernstein\/id-a_13964342\/\"><img decoding=\"async\" width=\"950\" height=\"807\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master-950x807.webp\" alt=\"Diamond Ring, 1977, by Richard Bernstein\" class=\"wp-image-367529\" srcset=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master-950x807.webp 950w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master-412x350.webp 412w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master-120x102.webp 120w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master-768x652.webp 768w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master.webp 960w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.1stdibs.com\/art\/prints-works-on-paper\/still-life-prints-works-on-paper\/richard-bernstein-diamond-ring-richard-bernstein\/id-a_13964342\/\"><em>Diamond Ring<\/em>, 1977, by Richard Bernstein<\/a><\/figcaption><\/figure><\/div>\n\n\n<p>Could that \u201cgirl\u2019s best friend\u201d actually be a phony? Say it ain&#8217;t so. Long before <a href=\"https:\/\/www.1stdibs.com\/buy\/marilyn-monroe\/\">Marilyn Monroe<\/a> sang of the affinity between a woman and her bling in the classic 1953 movie <em>Gentlemen Prefer Blonds<\/em>, the <a href=\"https:\/\/www.1stdibs.com\/jewelry\/stone\/diamond\/\">diamond<\/a> had become an icon of cultural resonance \u2014 not something that could (or should) be faked. The ancient Greeks considered diamonds to be tears of the gods. The Egyptian pharaohs thought they signified power. Louis XIV would have agreed: For one especially important meeting, he made an impressive show of authority in a suit embroidered with diamonds.<\/p>\n\n\n\n<p>Only the real thing could have that effect.<\/p>\n\n\n\n<p>So, how do you spot a fake diamond? How can you avoid being taken in by a synthetic or natural stone masquerading as a diamond? We reached out to experts for DIY methods of distinguishing genuine gems from impersonators like naturally occurring <a href=\"https:\/\/www.1stdibs.com\/buy\/moissanite-jewelry\/\">moissanite<\/a> and lab-made cubic zirconia.<\/p>\n\n\n\n<p>While eager to <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/mistakes-people-make-buying-diamonds\/\">share tips<\/a>, they cautioned that only a professional appraisal is guaranteed to be accurate. \u201cHave your diamond <a href=\"https:\/\/www.gia.edu\/gem-lab-service\/diamond-grading\">GIA certified<\/a>,\u201d says Alexandra Nova, director of sales and marketing at <a href=\"https:\/\/www.1stdibs.com\/dealers\/jack-weir-and-sons-inc\/\">Jack Weir &amp; Sons<\/a>. \u201cIf you&#8217;re buying from a credible dealer, they should be providing you with a GIA certificate or an alternative.\u201d<\/p>\n\n\n\n<p>Another caution: Distinguishing between natural and lab-grown diamonds is something you can\u2019t do on your own. \u201cIt requires a special machine,\u201d says Michael Malakov, of <a href=\"https:\/\/www.1stdibs.com\/dealers\/roman-malakov-diamonds\/\">Roman Malakov Diamonds<\/a><meta charset=\"utf-8\"><\/meta>, who <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/how-to-clean-a-diamond-ring\/\">graduated from the GIA Diamonds program<\/a>. He notes that it\u2019s worth the trouble, because natural diamonds cost about 90 percent more than those from a lab.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-popular-diamond-simulants\">Popular Diamond Simulants<\/h2>\n\n\n\n<p>Synthetic diamonds aren\u2019t the only stones to look out for. A number of natural \u201cdupes\u201d appear like the real thing to the untrained eye. Along with familiar stand-ins like glass, moissanite and cubic zirconia, these include white <a href=\"https:\/\/www.1stdibs.com\/jewelry\/stone\/sapphire\/\">sapphires<\/a>, white <a href=\"https:\/\/www.1stdibs.com\/jewelry\/stone\/topaz\/\">topaz<\/a>, white <a href=\"https:\/\/www.1stdibs.com\/jewelry\/stone\/zircon\/\">zircon<\/a> and phenakite, whose name aptly comes from the Greek word <em>phenakos<\/em>, meaning deceiver. Each of these \u201cdiamond simulants\u201d is unique in its own way, with its own refractive index (RI), which is the measure of how light bends, or refracts, as it passes through the mineral. Because diamonds have a dense molecular structure, they have very high RIs. This bending disperses light outward and inwards, from facet to facet, lending diamonds their captivating brilliance, fire and luster.<\/p>\n\n\n\n<p>Diamond is also the <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/april-birthstone-diamond\/\">hardest naturally occurring mineral<\/a>, ranked 10 on the Mohs scale, the most popular measure of a gemstone\u2019s durability and resistance to scratching. Moissanite \u2014first identified in 1893 in meteorites by the Nobel Prize\u2013winning chemist Dr. Henri Moissan and commercially grown for the <a href=\"https:\/\/www.1stdibs.com\/jewelry\/\">jewelry<\/a> industry since the mid-1990s \u2014 is a close rival to diamond in terms of hardness, with a Mohs number of 9.25. <\/p>\n\n\n\n<p>Moissanite also has a slightly higher RI than diamond and is double refractive meaning that light rays bend in two as they pass through. This produces a rainbow effect and less white light than is generated by a natural diamond. Moissanite has become a very popular <a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/\">engagement ring<\/a> stone because of its clarity, fire and durability. But if you\u2019re looking for a true diamond, Moissanite\u2019s unique optical qualities make it relatively easy to identify under a loupe.<\/p>\n\n\n\n<p>Here are some tests you can perform and details you can look for to distinguish diamonds from lookalikes, whether made in a lab or extracted from the earth.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-the-scratch-test\"><strong>The Scratch Test<\/strong><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/band-rings\/1001-cushion-cut-diamond-gia-certified\/id-j_14879312\/\"><img decoding=\"async\" width=\"950\" height=\"768\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/10_01_CU_D_IF_2022_02_16_12_33_43_eGeez__master-copy-950x768.jpg\" alt=\"10-carat cusion-cut diamond\" class=\"wp-image-367646\" srcset=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/10_01_CU_D_IF_2022_02_16_12_33_43_eGeez__master-copy-950x768.jpg 950w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/10_01_CU_D_IF_2022_02_16_12_33_43_eGeez__master-copy-433x350.jpg 433w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/10_01_CU_D_IF_2022_02_16_12_33_43_eGeez__master-copy-120x97.jpg 120w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/10_01_CU_D_IF_2022_02_16_12_33_43_eGeez__master-copy-768x621.jpg 768w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/10_01_CU_D_IF_2022_02_16_12_33_43_eGeez__master-copy-1154x933.jpg 1154w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/10_01_CU_D_IF_2022_02_16_12_33_43_eGeez__master-copy.jpg 1318w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/band-rings\/1001-cushion-cut-diamond-gia-certified\/id-j_14879312\/\">10.01-carat cushion-cut diamond<\/a><\/figcaption><\/figure><\/div>\n\n\n<p>This test requires a low-power magnifier, which you might already have at home. \u201c<a href=\"https:\/\/www.1stdibs.com\/buy\/cubic-zirconia-engagement\/\">Cubic zirconias<\/a> have a lot of scratches,\u201d says Malakov, \u201cbut you can\u2019t really scratch a diamond.\u201d So, look for scratches. Or take a chance and rub the stone against sandpaper \u2014 a real diamond will maintain its brilliance; a fake diamond won\u2019t. Beware of one myth that flips this logic: It isn\u2019t true that only a diamond can scratch glass. Any material with a Mohs number greater than 5 can do that.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-the-water-test\"><strong>The Water Test<\/strong><\/h2>\n\n\n\n<p>This requires only a full glass of water and a <a href=\"https:\/\/www.1stdibs.com\/jewelry\/loose-gemstones\/stone\/diamond\/\">loose stone<\/a>. Drop the stone in the glass. A true diamond will fall quickly to the bottom, while most fake diamonds will float and sink slowly<strong>.<\/strong> \u201cA diamond has a high density,\u201d explains Nova, \u201cso it should get to the bottom of the glass much faster than cubic zirconia.\u201d<\/p>\n\n\n\n<p>This test can\u2019t be used for stones in a setting, limiting its usefulness for anyone except jewelry makers and those wanting to create custom designs from purchased stones or ones removed from heritage pieces they want remodeled. <\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-the-fog-test\"><strong>The Fog Test<\/strong><\/h2>\n\n\n<div class=\"wp-block-image is-resized\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/cartier-emerald-cut-diamond-ring-french-circa-1935\/id-j_14805172\/\"><img decoding=\"async\" width=\"950\" height=\"713\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/27328_5_master-950x713.webp\" alt=\"Cartier emerald-cut diamond ring, ca. 1935\" class=\"wp-image-367945\" srcset=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/27328_5_master-950x713.webp 950w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/27328_5_master-466x350.webp 466w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/27328_5_master-120x90.webp 120w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/27328_5_master-768x576.webp 768w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/27328_5_master-1243x933.webp 1243w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/27328_5_master.webp 1318w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/cartier-emerald-cut-diamond-ring-french-circa-1935\/id-j_14805172\/\">Cartier emerald-cut diamond ring, ca. 1935<\/a><\/figcaption><\/figure><\/div>\n\n\n<p>Breathe on the stone. The resulting fog will dissipate immediately if it&#8217;s a diamond and linger if it&#8217;s a cubic zirconia or moissanite. Natural diamonds, which come from the hot core of the earth, are remarkably efficient when it comes to conducting heat. Bear in mind, however: This test will not reliably distinguish natural from lab-grown diamonds, since they share the same chemical, physical and optical properties and so disperse heat the same way. <\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-see-through-test\"><strong>See-Through Test<\/strong><\/h2>\n\n\n\n<p>Put a loose stone on top of the print in a newspaper, magazine or book. If you can read the text underneath, the stone is likely a moissanite or cubic zirconia. \u201cA real diamond has enough facets to refract the light,\u201d says Nova, \u201cso no text should be coming through.\u201d Similarly, you shouldn\u2019t be able to see the setting beneath a mounted diamond.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-sparkle-test\"><strong>Sparkle Test<\/strong><\/h2>\n\n\n<div class=\"wp-block-image is-resized\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/beauvince-gia-certified-100-carat-round-hvs2-engagement-ring\/id-j_15083742\/\"><img decoding=\"async\" width=\"950\" height=\"637\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/j_15083742_1647355084704_bg_processed-copy-950x637.jpg\" alt=\"Beauvince GIA Certified 1.00 Carat Round HVS2 Engagement Ring\" class=\"wp-image-367942\" srcset=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/j_15083742_1647355084704_bg_processed-copy-950x637.jpg 950w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/j_15083742_1647355084704_bg_processed-copy-522x350.jpg 522w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/j_15083742_1647355084704_bg_processed-copy-120x80.jpg 120w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/j_15083742_1647355084704_bg_processed-copy-768x515.jpg 768w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/j_15083742_1647355084704_bg_processed-copy.jpg 952w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/beauvince-gia-certified-100-carat-round-hvs2-engagement-ring\/id-j_15083742\/\">Beauvince GIA-certified 1-carat round HVS2 engagement ring<\/a><\/figcaption><\/figure><\/div>\n\n\n<p>If you set a true diamond next to a moissanite or cubic zirconia of the same color and clarity, the diamond will reflect more light, giving it greater sparkle. As mentioned above, Moissanite typically emits flashes of rainbow light, while cubic zirconia has a lower refractive index than diamond (about 2.15 to diamond\u2019s 2.42) meaning that it sparkles less intensely than the real thing. As noted above, Moissanite typically emits flashes of rainbow-colored light, while cubic zirconia has a lower refractive index than diamond (about 2.15 to diamond\u2019s 2.42), meaning that it sparkles less intensely.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-consider-the-setting\"><strong>Consider the Setting<\/strong><\/h2>\n\n\n\n<p>\u201cPeople come to me all the time with things that they have found,\u201d says Malakov. To determine whether the stone is genuine, the first thing he looks at is the mount. \u201cPeople come to me all the time with things that they have found,\u201d says Malakov. \u201cWhen something is set in <a href=\"https:\/\/www.1stdibs.com\/jewelry\/metal\/sterling-silver\/\">sterling silver<\/a>, it\u2019s a red flag that it\u2019s not real.\u201d<\/p>\n\n\n\n<p>In addition to being less expensive (and why set a pricey stone in a less pricey <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/engagement-ring-settings-guide\/\">setting<\/a>?), sterling silver is soft, so the stone is more likely to come loose.<\/p>\n\n\n\n<p>One caution: Don\u2019t confuse sterling silver, marked 925, with rare and very expensive <a href=\"https:\/\/www.1stdibs.com\/jewelry\/metal\/platinum\/\">platinum<\/a>, which may be marked Platinum, PLAT or PT, or with <a href=\"https:\/\/www.1stdibs.com\/jewelry\/metal\/white-gold\/\">white gold<\/a>. The latter can appear blackened, like tarnished silver, but this is due to the rhodium with which it is typically coated having peeled off or worn away.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-check-the-color\"><strong>Check the Color<\/strong><\/h2>\n\n\n<div class=\"wp-block-image is-resized\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/flawless-clarity-d-color-gia-certified-10-carat-pear-cut-diamond\/id-j_11710872\/\"><img decoding=\"async\" width=\"950\" height=\"950\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-950x950.webp\" alt=\"Flawless Clarity D Color GIA Certified 10 Carat Pear Cut Diamond\" class=\"wp-image-367937\" srcset=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-950x950.webp 950w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-350x350.webp 350w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-120x120.webp 120w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-768x768.webp 768w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-300x300.webp 300w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-933x933.webp 933w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master-216x216.webp 216w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/11710872_master.webp 1318w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/flawless-clarity-d-color-gia-certified-10-carat-pear-cut-diamond\/id-j_11710872\/\">Flawless clarity D color GIA-certified 10-carat pear-cut diamond<\/a><\/figcaption><\/figure><\/div>\n\n\n<p>It takes a certified professional to determine the <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/4-cs-grading-diamonds\/\">color grade of a diamond<\/a>, which goes from D (colorless) to Z (light yellow or brown). Hues J to Z, however, can be distinguished by the naked eye. So, a colorless gem should raise suspicions. There\u2019s a small chance it may be an extremely rare grade D diamond, but as Malakov points out, \u201ccubic zirconias are all white.\u201d Colorless and common. Consider the odds. <\/p>\n\n\n\n<p>Diamonds in antique settings often appear warmer in tone than modern ones  because they  typically have high crowns, small tables and open culets (the open facet at the base of the stone). Such a cut splinters the light less than modern ones, resulting in reduced brilliance but a glittering glow that is enhanced by candlelight. <\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-examine-the-facets\"><meta charset=\"utf-8\"><strong>Examine the Facets<\/strong><\/h2>\n\n\n\n<p>\u201cIf you put a diamond to the light, the angles of the facets of a real diamond are very sharp and meet perfectly,\u201d says Malakov, noting that by contrast, \u201cin a cubic zirconia, the angles aren\u2019t very straight, and they don\u2019t meet perfectly \u2014 you might have some facet overlapping or some extra facets.\u201d<\/p>\n\n\n\n<p>Most high-quality diamonds \u201cwill have facets on the girdle,\u201d adds Nova, referring to the thin band that touches the setting and divides the bottom of the gem from its crown. \u201cInstead of being perfectly smooth, it should look like someone made little marks with a blade around the girdle. It&#8217;s a very specific thing that you can probably see with a loupe.\u201d<\/p>\n\n\n\n<p>Vintage stones might have larger, slightly misaligned triangular facets. Indeed, old mine diamonds are often described as \u201cromantic\u201d because of their hand-cut look and warm tonal color. Although crafted by skilled artisans, they don\u2019t display the same sharp symmetry as modern gems, which are usually shaped and finessed by machine and are characterized by a softened profile, which is often cushion-shaped. <\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-look-for-flaws\"><strong>Look for Flaws<\/strong><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/david-rosenberg-1041-carat-emerald-cut-f-vvs2-gia-diamond-engagement-ring\/id-j_13793882\/\"><img decoding=\"async\" width=\"950\" height=\"616\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/2021_11_29_17_22_46_master-copy-950x616.jpg\" alt=\"David Rosenberg 10.41 Carat Emerald Cut F VVS2 GIA Diamond Engagement Ring, 21st century\" class=\"wp-image-367936\" srcset=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/2021_11_29_17_22_46_master-copy-950x616.jpg 950w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/2021_11_29_17_22_46_master-copy-540x350.jpg 540w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/2021_11_29_17_22_46_master-copy-120x78.jpg 120w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/2021_11_29_17_22_46_master-copy-768x498.jpg 768w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/2021_11_29_17_22_46_master-copy.jpg 1318w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/david-rosenberg-1041-carat-emerald-cut-f-vvs2-gia-diamond-engagement-ring\/id-j_13793882\/\">David Rosenberg 10.41-carat emerald-cut F VVS2 diamond ring, 21st century<\/a><\/figcaption><\/figure><\/div>\n\n\n<p>It\u2019s estimated that fewer than 0.5 percent of natural diamonds have no inclusions, minuscule imperfections that occur when a stone is formed 100 miles below the Earth\u2019s surface. \u201cIf it doesn&#8217;t have any inclusions, it\u2019s very likely not a natural stone,\u201d says Nova, adding that a five-carat diamond without any inclusions is either lab-created &#8220;or it costs more than a hundred thousand dollars.\u201d<\/p>\n\n\n\n<p>Keep in mind that inclusions are found in both mined and lab-grown diamonds, so it takes an expert eye to read them correctly, especially since they take many forms: They can be bubbly, grainy, fuzzy, feathery, rod-shaped and even knot-like; some, called \u201ctwinning wisps,\u201d are little clusters of pinpoints, needles, clouds or crystals. Inclusions are the result of disturbances occurring during a stone\u2019s formation. Since how they were formed is all that truly separates natural from synthetic diamonds, the inclusions displayed can be critical in distinguishing between them. For example, synthetic diamonds may show tiny traces of iron, nickel and cobalt \u2014 metal catalysts used during the lab formation process, while natural diamonds usually show minute traces of nitrogen drawn from deep inside the earth\u2019s mantle.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-diamond-grading-and-certification\">Diamond Grading and Certification <\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"950\" height=\"950\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-950x950.webp\" alt=\"1.00 Carat Loose G \/ VS1 Asscher Cut Diamond GIA Certified\" class=\"wp-image-423901\" srcset=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-950x950.webp 950w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-350x350.webp 350w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-120x120.webp 120w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-768x768.webp 768w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-300x300.webp 300w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-933x933.webp 933w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master-216x216.webp 216w, https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/SDY_1062_2_master.webp 1400w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/figure>\n\n\n\n<p><br>Diamond certification requires enormous skill, so for accurate determinations of both a stone\u2019s genuineness and quality, it&#8217;s important to choose your lab wisely. Perhaps the most respected is the <a href=\"https:\/\/www.gia.edu\/\">Gemological Institute of America<\/a> (GIA). Not only do they offer precise <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/4-cs-grading-diamonds\/\">grading on the 4Cs<\/a> \u2014 <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/gemstone-cuts\/\">cut<\/a>, clarity, color and <a href=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/karat-carat-difference\/\">carat weight<\/a> \u2014 but they also use advanced techniques to distinguish natural from lab-grown diamonds and simulants. These include thermal testing, which measures how fast a gemstone disperses heat; fluorescence imaging, which grades the \u201cglow\u201d it emits under ultraviolet light; and photoluminescence spectroscopy, which analyzes its atomic structure via high-intensity lasers. Other organizations, such as the <a href=\"https:\/\/www.igi.org\/\">International Gemological Institute<\/a> (IGI), <a href=\"https:\/\/www.gubelingemlab.com\/en\/gemlab\">G\u00fcbelin Gem Lab<\/a> and the <a href=\"https:\/\/www.americangemsociety.org\/\">American Gem Society<\/a> (AGS) are reputable organizations that can confirm whether a buyer has a fake diamond or a genuine stone.<\/p>\n\n\n\n<p>Certificates from one of these labs provide peace of mind to the owner and also act as a guarantee for insurers and for future buyers, essential for a smooth and fair resale, as well as potential upgrades. <\/p>\n\n\n\n<p class=\"has-text-align-center\"><br><em>Updated January 2025.<\/em><\/p>\n\n\n\t<div class=\"interstitial-banner interstitial-banner-collection interstitial-container\">\n\t\t<div class=\"interstitial-content\">\n\t\t\t<div class=\"interstitial-background-image\">\n\t\t\t\t<img decoding=\"async\" width=\"960\" height=\"300\" src=\"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/j_14841152_1645472059117_bg_processed-960x300.webp\" class=\"attachment-interstitial size-interstitial\" alt=\"oval diamond\" \/>\t\t\t<\/div>\n\t\t\t<div class=\"container interstitial-text\">\n\t\t\t\t<a class=\"interstitial-link-around-text\" href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/stone\/diamond\/\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t<div class=\"interstitial-heading\">\n\t\t\t\t\t\tShop Diamond Engagement Rings on 1stDibs\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"interstitial-subheading\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t<a class=\"gold-button\" href=\"https:\/\/www.1stdibs.com\/jewelry\/rings\/engagement-rings\/stone\/diamond\/\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t<span>View All<\/span>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Could that \u201cgirl\u2019s best friend\u201d actually be a phony? Say it ain&#8217;t so. Long before Marilyn Monroe sang of the affinity between a woman and her bling in the classic 1953 movie Gentlemen Prefer Blonds, the diamond had become an icon of cultural resonance \u2014 not something that could (or should) be faked. The ancient [&hellip;]<\/p>\n","protected":false},"author":426,"featured_media":367529,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"apple_news_api_created_at":"2025-01-14T19:52:55Z","apple_news_api_id":"37c2e67e-8329-4115-99ff-0426960eede8","apple_news_api_modified_at":"2025-01-16T21:26:01Z","apple_news_api_revision":"AAAAAAAAAAAAAAAAAAAABw==","apple_news_api_share_url":"https:\/\/apple.news\/AN8LmfoMpQRWZ_wQmlg7t6A","apple_news_cover_media_provider":"image","apple_news_coverimage":0,"apple_news_coverimage_caption":"","apple_news_cover_video_id":0,"apple_news_cover_video_url":"","apple_news_cover_embedwebvideo_url":"","apple_news_is_hidden":"","apple_news_is_paid":"","apple_news_is_preview":"","apple_news_is_sponsored":"","apple_news_maturity_rating":"","apple_news_metadata":"\"\"","apple_news_pullquote":"","apple_news_pullquote_position":"","apple_news_slug":"","apple_news_sections":[],"apple_news_suppress_video_url":false,"apple_news_use_image_component":false,"footnotes":""},"categories":[15523143],"tags":[],"dibs-categories":[],"dibs-designs":[],"dibs-styles":[],"dibs-creators":[],"dibs-sellers":[],"class_list":["post-366091","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jewelry-2"],"acf":{"post_format":"article","subtitle":"When only the real thing will do, here are some ways to determine whether that sparkler is an authentic diamond. ","contributors":{"hide_byline":false,"columnist":[{"ID":361858,"post_author":"1","post_date":"2021-12-14 22:36:15","post_date_gmt":"2021-12-15 03:36:15","post_content":"","post_title":"1stDibs Editors","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"1stdibs-editors","to_ping":"","pinged":"","post_modified":"2021-12-14 22:36:15","post_modified_gmt":"2021-12-15 03:36:15","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.1stdibs.com\/blogs\/the-study\/contributors\/1stdibs-editors\/","menu_order":0,"post_type":"contributors","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":361853,"post_author":"1","post_date":"2021-12-14 22:36:15","post_date_gmt":"2021-12-15 03:36:15","post_content":"","post_title":"Lisa Santandrea","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"lisa-santandrea","to_ping":"","pinged":"","post_modified":"2021-12-14 22:36:15","post_modified_gmt":"2021-12-15 03:36:15","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.1stdibs.com\/blogs\/the-study\/contributors\/lisa-santandrea\/","menu_order":0,"post_type":"contributors","post_mime_type":"","comment_count":"0","filter":"raw"}],"photographer":"","custom_byline":false},"show_date":true,"interstitial_banners":[{"acf_fc_layout":"collection","interstitial_banner_shortcode":"diamond-engagement-rings","interstitial_banner_background_image":367513,"interstitial_banner_heading":"Shop Diamond Engagement Rings on 1stDibs","interstitial_banner_subheading":"","interstitial_banner_button_text":"View 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Diamond","fimg_url":{"thumbnail":{"source_url":"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master-120x102.webp","width":120,"height":102},"medium":{"source_url":"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master-412x350.webp","width":412,"height":350},"full":{"source_url":"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master.webp","width":960,"height":815}},"jetpack_featured_media_url":"https:\/\/www.1stdibs.com\/blogs\/the-study\/wp-content\/uploads\/B4A6C2A7_A6A8_42EA_8DEB_4E31D28AAA4D_master.webp","apple_news_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Spot a Fake Diamond | The Study<\/title>\n<meta name=\"description\" content=\"When only the real thing will do, here are some ways to determine 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