$440Sale Price|20% Off
Natural Loose Diamond 0.50 Carat J SI2 Marquise Engagement Closeouts
Located in New York, NY
ITEM DESCRIPTION ID #: 54109 Stone Shape: Marquise Diamond Weight: 0.50CT Clarity: SI2 Color: J-K Measurements 8.18x4.20x2.46mm Our Price: $550 These genuine diamonds are graded ap...
White Diamond
GIA 1.20 Carat Fancy Brownish Orangy Yellow Oval Cut VS2 Natural Loose Diamond
Located in Miami, FL
GIA-certified 1.20 carat natural fancy color diamond graded Fancy Brownish Orangy Yellow with VS2 clarity, oval modified brilliant cut measuring 8.43 x 6.21 x 3.31mm, offered as a lo...
Brown Diamond
6.76 Carat Pair Of GIA Certified Pear Cut Diamonds - I Color SI1-SI2 Loose
Located in Miami, FL
GIA-certified pair of pear-cut natural loose diamonds. Both I color and range from SI1-SI2 in clarity.
Diamond
GIA Certified 3.19 Carat Natural Diamond Round Brilliant Cut J VS1 Excellent Cut
Located in Los Angeles, CA
This loose diamond is a GIA-certified natural round brilliant cut diamond, offering strong brilliance, excellent clarity, and a well-balanced size.
Diamond
GIA Certified 3.25 Carat Old European Cut Natural Diamond K VS2
Located in Los Angeles, CA
This loose diamond is a GIA-certified natural circular brilliant cut diamond, offering strong size, clean clarity, and a bright face-up appearance.
Diamond
GIA Certified 4.02 CT Natural Diamond Round Brilliant Cut K SI1 Very Good Cut
Located in Los Angeles, CA
This loose diamond is a GIA-certified natural round brilliant cut diamond, offering impressive size, balanced performance, and strong visual presence.
Diamond
GIA Certified Huge 2.07 Carat Natural Round Brilliant Cut Diamond H SI1
Located in Los Angeles, CA
This loose diamond is a GIA-certified natural round brilliant cut diamond, offering strong brilliance, balanced proportions, and excellent everyday wearability.
Diamond
GIA Certified Huge 4.54 Carat Natural Round Cut Diamond J SI2 eye clean
Located in Los Angeles, CA
This loose diamond is a GIA-certified natural round brilliant cut diamond, offering impressive size, strong brilliance, and excellent value in a large carat weight.
Diamond
GIA Certified Huge 3.07 CT Natural Diamond Cushion Brilliant Cut I VS1
Located in Los Angeles, CA
This loose diamond is a GIA-certified natural cushion modified brilliant cut diamond, offering a balanced combination of size, clarity, and brilliance.
Diamond
GIA 3.00 Carat Natural Diamond Pear Brilliant Cut D Color I1 Clarity Deal
Located in Los Angeles, CA
This loose diamond is a GIA certified natural pear modified brilliant cut diamond, offering exceptional color, strong size, and an elegant elongated silhouette.
Diamond
GIA Certified 4.01 Carat Round Cut Natural Diamond I SI1 Excellent Cut
Located in Los Angeles, CA
It is perfect for anyone looking to add a beautiful and unique diamond to their collection. Natural Diamond Round Brilliant 4.01 Carat GIA Loose Diamond Excellent Cut.
Diamond
Natural 0.74ct Gia L SI2 Triangular Cut Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
Natural 0.75ct GIA G SI2 Triangular Cut Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
$25,600Sale Price|20% Off
GIA certified diamond 1.01ct Fancy PInk diamond loose NATURAL COLOR
Located in Boca Raton, FL
Loose GIA diamond fancy pink, will comes with all certififcates.
Pink Diamond
2.66ct Marquise Fancy Yellow-Brown Diamond GIA Natural Diamond Loose Stone
Located in Carmel By The Sea, CA
Title: 2.66ct Marquise Fancy Yellow-Brown Diamond GIA Natural Diamond Loose Stone Description: Loose natural diamond with GIA report.
Brown Diamond
Natural 0.61ct Gia I SI2 Round Novelty Cut Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
$1,580Sale Price|20% Off
Natural loose 1.32 Carat K SI3 Round Brilliance Diamond
Located in New York, NY
ITEM DESCRIPTION ID #:NYC57484 Stone Shape:Round Brilliance Diamond Weight:1.32 carat Clarity:SI3 Color:K Cut: Round Measurements: 6.86 x 6.86 x 4.38 mm Appraisal Value:$2965.00 Ou...
Diamond
$1,439Sale Price|20% Off
Natural loose 1.45 Carat H I1 Round Brilliance Diamond
Located in New York, NY
ITEM DESCRIPTION ID #:NYC57483 Stone Shape:Round Brilliance Diamond Weight:1.45 carat Clarity:I1 Color:H Cut: Round Measurements: 6.91 x 6.93 x 4.49 mm Appraisal Value:$2698.00 Our...
Diamond
$1,999Sale Price|20% Off
1ct Hexagonal Natural Diamond, Unisex Loose Gemstone, Modern Design
Located in New York, NY
ITEM DESCRIPTION Stone Shape: CUSHION MODIFIED BRILLIANT Diamond Weight: 1 ct Our Price: $2499.00 A free online appraisal is included upon request.
Diamond
$1,999Sale Price|20% Off
1ct Hexagonal Natural Diamond, Unisex Loose Gemstone, Modern Design
Located in New York, NY
ITEM DESCRIPTION Stone Shape: CUSHION MODIFIED BRILLIANT Diamond Weight: 1 ct Our Price: $2499.00 A free online appraisal is included upon request.
Diamond
GIA Certified Moval 1.48 Carat E/VS1 Loose Natural Diamond
Located in Miami, FL
GIA-certified loose natural diamond featuring 1.48 carats in modified marquise cut, this unique cut is a mix of an oval and a marquise, otherwise known as a 'Moval-Cut' with E color ...
Diamond
Briolette Natural Diamond, GIA Certified 3.81ct, Fancy Brown Loose Gemstone
Located in Ramat Gan, IL
Discover this exquisite unique 3.81 carat natural Briolette Cut diamond, GIA Certified ( GIA no. 2231658907 ) for authenticity and quality.
Diamond
GIA Certified 0.62 Carat Fancy Brownish Orangy Pink Oval natural Diamond
By Ajami Diamonds
Located in Ramat Gan, IL
Offered is a rare GIA certified natural colored diamond weighing 0.62 carats, beautifully cut as Oval modified brilliant cut. This elegant gemstone displays a captivating Fancy Brown...
Diamond
GIA Certified 1.27 Carat Fancy Vivid Yellow Oval Brilliant natural Diamond
By Ajami Diamonds
Located in Ramat Gan, IL
Offered is a rare GIA certified natural colored diamond weighing 1.27 carats, beautifully cut in an elegant oval brilliant cut. This exceptional gemstone exhibits a highly coveted Fa...
Yellow Diamond
GIA Certified Loose 3.74ct Radiant Cut Natural Diamond E - SI2
Located in Carmel By The Sea, CA
GIA Certified 3.74ct Cut-Cornered Rectangular Modified Brilliant Diamond E, SI2 Description: This GIA-certified 3.74-carat natural diamond is a stunning cut-cornered rectangular mod...
Diamond
5.04 ct. Heart Shape Natural E Internally Flawless Diamond — GIA Certified
By Ajami Diamonds
Located in Ramat Gan, IL
This 5.04 carat Heart Brilliant Natural Diamond is a breathtaking expression of luxury and rarity. Certified by GIA, the stone boasts the prestigious Internally Flawless clarity grad...
Diamond
$6,528Sale Price|20% Off
Natural Loose 1.40 Carat Fancy Brown VS2 Penis Cut Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: 56700 Stone Shape: Penis Cut Diamond Diamond Weight: 1.40 CT Clarity: VS2 Color: Fancy Brown Measurements 10.00 x 6.00 x 4.57 mm Our Price: $8160.00 Appraisa...
Diamond, White Diamond, Brown Diamond
$4,624Sale Price|20% Off
GIA Certified 0.91CT D SI1 Round Brilliant Loose Natural Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: 56575 Stone Shape: Round Brilliant Diamond Weight: 0.91CT Clarity: SI1 Color: D Cut: Poor Measurements: 5.95-6.01*4.05mm Depth %: 67.7% Table %: 61% Symmetr...
Diamond, White Diamond, Blue Diamond
1.36 Carat Very Light Green VVS2 Round Brilliant Natural Diamond — GIA Certified
By Ajami Diamonds
Located in Ramat Gan, IL
This exquisite 1.36 carat Natural Very Light Green Round Brilliant Diamond is certified by GIA and displays a rare, naturally formed green hue. With an impressive VVS2 clarity grade,...
Diamond
Natural 0.62ct Gia Fancy Yellow VVS2 Oval Brilliant Cut Loose Diamond
By GIA
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
Natural 1.61ct Gia Fancy Yellow I1 Round Brilliant Cut Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
$2,576Sale Price|20% Off
Natural Loose 1.00ct F Color I1 Clarity Hexagonal Diamond, Unisex
Located in New York, NY
ITEM DESCRIPTION ID #: 55532 Stone Shape: Hexagonal Shape Diamond Weight: 1.00 CT Clarity: I1 Color: F Measurements: 6.79 x 6.80 x 2.71 mm Our Price: $3220.00 Appraisal Price: $4830...
Diamond, White Diamond
Natural 0.29ct Gia Undetermined Fancy Intense Yellow VS2 Princess Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
$1,200Sale Price|20% Off
GIA Certified 0.10ctw Fancy Orangy Pink Natural Round Loose Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC58606 Stone Shape: Round Diamond Weight: 0.10ctw Fancy Color: Fancy Orangy Pink Cut: Round Brilliant Symmetry: Good Polish: Good Fluorescence : None Measur...
Pink Diamond
GIA Certified 1.64 Carat Light Blue Radiant Cut Diamond, Natural Color, VS1 Clar
By Ajami Diamonds
Located in Ramat Gan, IL
Presented is a striking GIA certified natural colored diamond weighing 1.64 carats, expertly cut in a cut-cornered rectangular modified brilliant, Radiant cut. This elegant gemstone ...
Blue Diamond
GIA Certified 3.54 Carat Round Cut G/VS2 Loose Natural Diamond
Located in Miami, FL
GIA-certified loose natural diamond featuring 3.54 carats in round brilliant cut with G color and VS2 clarity.
Diamond
$460Sale Price|20% Off
IGI, 0.14 Carat Natural Fancy Pink Brown Round Shape Loose Diamond
Located in Great Neck Plaza, NY
IGI , Natural fancy pink brown round shape diamond weighing 0.14 carats. *Free shipping within the U.S.*
Diamond, Pink Diamond, Brown Diamond
IGI, 0.16 Carat Natural Fancy Orangy Pink Round Shape Loose Diamond
Located in Great Neck Plaza, NY
Natural fancy orangy pink round shape diamond weighing 0.16 carats. IGI CERT *Free shipping within the U.S.*
Diamond, Pink Diamond, Brown Diamond
HEAVY DISCOUNT GIA, 8.17 Carat Natural Fancy Yellow Round Loose Diamond
Located in Great Neck Plaza, NY
GIA 8.17cts Natural fancy deep brownish yellow round loose diamond *Free shipping within the U.S
Yellow Diamond, Diamond, 14k Gold, Yellow Gold
GIA Radiant 6.17ct. Natural Loose F. Grayish Yellowish Green VVS2 Diamond
Located in Ramat Gan, Tel Aviv District
GIA Report #2165887491 GIA Radiant 6.17 Carat Natural Loose Fancy Grayish Yellowish Green VVS2 Diamond Color: Natural Fancy Grayish Yellowish Green Shape and Cut: Radiant Cut Car...
Diamond
$20,000Sale Price|31% Off
GIA Certified 1.50 Carat Pear Cut Natural Diamond Loose Teardrop
By Antinori Fine Jewels
Located in Chicago, IL
This sizeable 1.50 carat GIA certified pear cut diamond offers vibrant sparkle, a completely eye clean appearance, bright white D color, and a glamorous cut. The diamond is certified...
Diamond
GIA Certified Loose 3.74ct Radiant Cut Natural Diamond E - SI2 - VIDEO!
Located in Carmel By The Sea, CA
GIA Certified 3.74ct Cut-Cornered Rectangular Modified Brilliant Diamond E, SI2 VIDEO! Description: This GIA-certified 3.74-carat natural diamond is a stunning cut-cornered rectang...
Diamond
$680Sale Price|20% Off
GIA CLEARANCE, 1.08 Carat Natural Fancy Dark Brown Cushion Loose Diamond
Located in Great Neck Plaza, NY
GIA Natural fancy dark brown cushion diamond weighing 1.08 carats. Measures 5.55 x 4.99 x 4.30 mm *Free shipping within the U.S.*
Diamond, Brown Diamond, 14k Gold, White Gold
Natural 0.31ct Gia H VS2 Rare Square Double Rose Cut Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
GIA Certified Octagonal 1.54 Carat Natural Loose Fancy Yellow VS1 Diamond
Located in Ramat Gan, Tel Aviv District
GIA Report #1152802365 GIA Certified Octagonal 1.54 Carat Natural Loose Fancy Yellow VS1 Diamond Shape and Cut: Modified Octagonal Brilliant.
Diamond
Natural 0.24ct Gia Treated Fancy Intense Yellow Half Moon Cut Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
Natural 1.80ct Gia Fancy Dark Brown Green Yellow Heart Brilliant Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
$600Sale Price|20% Off
CLEARANCE, 1.00 Carat Natural Fancy Dark Yellow Brown Round Loose Diamond
Located in Great Neck Plaza, NY
Natural fancy dark yellow brown round diamond ,Excellent shine *Free shipping within the US
Diamond, Brown Diamond, Gold, 14k Gold, Yellow Gold
1.75CT Fancy Yellow Old Miner Cut Diamond Loose Natural I2 Antique Cushion
Located in Carmel By The Sea, CA
Title: 1.75CT Fancy Yellow Old Mine Cut Diamond Loose Natural I2 Antique Cushion Description: Loose natural diamond weighing 1.75 carats, cut in an Old Mine Cut cushion shape.
Diamond
GIA Certified 0.81 Carat Fancy Vivid Yellow Pear Cut Loose Natural Diamond
Located in Miami, FL
Product Specifications: Item Type: Loose Diamond Report Date: November 21, 2025 Report Type: Grading Report Origin: Natural Laser Inscription: GIA 5232786233 Certification: GIA Repo...
Yellow Diamond
GIA Certified Pear 8.27ct. Natural Loose F. Grayish Yellowish Green VVS2 Diamond
Located in Ramat Gan, Tel Aviv District
GIA Report #2165887491 GIA Radiant 8.27 Carat Natural Loose Fancy Grayish Yellowish Green VVS2 Diamond Color: Natural Fancy Grayish Yellowish Green Shape and Cut: Pear Modified Br...
Diamond
$3,236Sale Price|20% Off
Natural Loose 1.76ct Round Cut White Diamond, SI1 Clarity, L Color
Located in New York, NY
ITEM DESCRIPTION ID #: 56812 Stone Shape: Round Cut Diamond Diamond Weight: 1.76 CT Clarity: SI1 Color: L Measurements: 7.03 x 7.05 x 5.16 mm Our Price: $4045.00 These genuine diamon...
White Diamond
1.51ct Loose Natural Princess Cut Diamond, AusCert, F/VS2 Valued at $39000.
Located in MELBOURNE, AU
AusCertified Loose Natural Earth-Mined Princess Cut Diamond of 1.51ct (6.43 - 6.17mm x 4.69mm) Colour: F Clarity: VS2 Polish: Excellent Symmetry: Excellent Fluorescence: None Comes...
Diamond
Natural 0.71ct Gia N VVS2 Bent Top Rectangular Emerald Step Cut Loose Diamond
Located in Houston, TX
One loose diamond described as follows... In excellent condition.
Diamond
GIA Certified 4.10 Carat Round Brilliant Cut D/VS2 Natural Diamond Loose Stone
Located in Miami, FL
GIA-certified 4.10 carat natural round brilliant diamond in D color and VS2 clarity — the highest color grade available — offered as a loose investment-grade stone with GIA report nu...
Diamond
GIA Certified Marquise 3.70 Carat Natural Loose Fancy Deep Yellow SI2 Diamond
Located in Ramat Gan, Tel Aviv District
GIA Report #15589045 GIA Certified Marquise 3.70 Carat Natural Loose Fancy Deep Yellow SI2 Diamond Shape and Cut: Marquise Brilliant.
Diamond
GIA 1.62 Carat Loose Round Brilliant Cut Natural Diamond I Color VS2 Clarity
Located in Carmel By The Sea, CA
Diamond Details Shape & Cut: Round Brilliant Cut Carat Weight: 1.62 carats Measurements: 7.36 – 7.51 x 4.60 mm Color Grade: I Clarity Grade: VS2 Cut Grade: Good Polish: Good Symmetry...
Diamond
Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.
From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!
There are several factors that set diamonds apart from other stones, and these points are important to our gem education.
Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.
In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).
When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings.
Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.
Are you shopping for diamonds and other loose gemstones to create your own custom jewelry?
Why might you purchase a diamond or gemstone “loose” — that is, on its own, not mounted in a piece of jewelry? Perhaps you’re a connoisseur looking to acquire a unique investment. The scarcity of high-quality colored diamonds, for instance, especially pink diamonds, means that their value increases over time; the same is true of rare Kashmir sapphires and Burmese rubies. Far rarer than diamonds, Paraiba tourmaline, discovered only in the 1980s, is treasured as much for its extraordinary color as its scarcity, both of which contribute to its high value.
A more common scenario would be that you’re hoping to create a very special piece of custom jewelry, such as an engagement ring or a milestone-birthday present, and want to personally select the most beautiful, unusual, or ultra-rare stone you can find and afford. Doing so adds to the romance and substance of the gift and can be a part of the story told as the jewel is passed from generation to generation.
If this sounds like you, read on for tips on becoming one of the world’s savviest gem hunters.
Educate yourself: When buying any piece of gem-set fine jewelry, you should familiarize yourself with the factors that determine a stone’s price. This will enable you to streamline your search for the perfect gem and have intelligent, productive conversations with sellers.
There is a wealth of information online, such as our diamond-buying guide and this overview of colored gemstones for engagement rings. The buying guides of the Gemological Institute of America (GIA), searchable by stone type, are also a widely trusted source for consumers venturing into the world of diamonds and gems for the first time.
Vet your vendor: If you peruse 1stDibs with any regularity, you know there is no shortage of vendors who deal in top-quality loose gemstones. (Read about our vetted sellers.) Finding a trustworthy, established dealer may be as easy as getting a recommendation from friends or family. And, although it may sound obvious, it pays to Google your candidates — and consult customer reviews — before making contact.
Harakh Mehta, designer and founder of the Mumbai, India–based fine-jewelry brand Harakh, has an innate understanding of proper client relations, especially when the customer is in unfamiliar territory. “Start chatting with the dealer, get to know them better," he says. "It’s very important to establish a comfort level. We never push a sale, as we want it to be a carefully considered purchase. So, if the client is not in a rush, we do it over a few virtual meetings or phone calls.”
Request documentation: The best dealers go to great lengths to furnish clients with documents verifying the quality rating, natural origin and provenance of a stone — showing, for example, that loose emerald hails from the famous Muzo mine in Colombia — and disclosing any treatments applied to enhance its appearance. (And who doesn't love emerald jewelry? The most valuable emeralds are the ones that have a deep bluish-green to true green color and no visible inclusions.)
If no grading report is available for a stone you are interested in, the dealer should be able to provide an authenticity document, such as an appraisal or info sheet, that has been signed by an in-house gemologist or professional appraiser. Google those names, too, for extra peace of mind.
Ask for videos and visuals: When transacting with a gem dealer online, you should always request real-time videos and photographs, since professional photos of a stone, usually on a white background, have likely been retouched for optimal presentation.
Read more about how to buy loose gemstones and find your dream gems today on 1stDibs.