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1 Ct Internally Flawless Diamond

GIA Certified 1 Carat Heart Shape 18K Gold Ring Internally FLAWLESS F COLOR
GIA Certified 1 Carat Heart Shape 18K Gold Ring Internally FLAWLESS F COLOR

GIA Certified 1 Carat Heart Shape 18K Gold Ring Internally FLAWLESS F COLOR

By Antinori Fine Jewels

Located in Chicago, IL

of love with our enchanting GIA certified 1 ct Heart-Shaped Diamond Ring in lustrous 18K White Gold

Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Emerald, 18k Gold

18kt White Gold Ring With 2.5 ct Princess cut & 1 ct Brilliant cut Diamond
18kt White Gold Ring With 2.5 ct Princess cut & 1 ct Brilliant cut Diamond

18kt White Gold Ring With 2.5 ct Princess cut & 1 ct Brilliant cut Diamond

Located in Antwerp, BE

18kt White Gold Ring With 2.5 ct Princess cut & 1 ct Brilliant cut Diamonds Diamonds: 16 Princess

Category

21st Century and Contemporary Belgian Artisan Signet Rings

Materials

Diamond, 18k Gold, White Gold

GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style 18K White Gold Ring
GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style 18K White Gold Ring

GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style 18K White Gold Ring

By Unbranded

Located in Oakton, VA

approximately 1 carat with D color and IF clarity. The space between the bezel setting of the main diamond are

Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Rare GIA Certified Type 2A I Flawless 6.00 Carat Natural Pink Oval Diamond Ring
Rare GIA Certified Type 2A I Flawless 6.00 Carat Natural Pink Oval Diamond Ring

Rare GIA Certified Type 2A I Flawless 6.00 Carat Natural Pink Oval Diamond Ring

Located in Tustin, CA

is a very noteworthy and very collectible natural pink diamond that is Internally Flawless and is

Category

21st Century and Contemporary American Artisan Solitaire Rings

Materials

Diamond, Pink Diamond, 18k Gold, Rose Gold, White Gold

Beauvince Yellow Cushion Diamond Dangle Halo Earrings 3.67 ct Diamonds in Gold
Beauvince Yellow Cushion Diamond Dangle Halo Earrings 3.67 ct Diamonds in Gold

Beauvince Yellow Cushion Diamond Dangle Halo Earrings 3.67 ct Diamonds in Gold

By Beauvince Jewelry

Located in New York, NY

-T Diamond Clarity: IF & VVS2 (Internally Flawless & Very Very Slightly Included 2) EGLUSA

Category

2010s Contemporary Dangle Earrings

Materials

Diamond, Yellow Diamond, 18k Gold, Gold, White Gold, Yellow Gold

Victorian 1.60 Ct Old Mine Diamond Trilogy Engagement Ring 18 KT/Silver
Victorian 1.60 Ct Old Mine Diamond Trilogy Engagement Ring 18 KT/Silver

Victorian 1.60 Ct Old Mine Diamond Trilogy Engagement Ring 18 KT/Silver

Located in Napoli, IT

Hallmarks: present but worn Gems: 1 cushion old mine cut diamonds of .80 Ct – Flawless except one chip rated

Category

Antique 1890s European Late Victorian Three-Stone Rings

Materials

Diamond, 18k Gold, Silver

GIA Certified 1 Carat Emerald Cut Diamond 18k White Gold Ring
GIA Certified 1 Carat Emerald Cut Diamond 18k White Gold Ring

GIA Certified 1 Carat Emerald Cut Diamond 18k White Gold Ring

By Antinori Fine Jewels

Located in Chicago, IL

mesmerizing D color and Internally Flawless clarity, this diamond exudes unparalleled brilliance. Its

Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, Emerald, 18k Gold, White Gold

Gold and Diamond Set – Collier, Earrings and Ring
Gold and Diamond Set – Collier, Earrings and Ring

Gold and Diamond Set – Collier, Earrings and Ring

Located in Berlin, BE

– Accent stones Quantity: 18 Carat (each): 0.25 ct Color: F–H Clarity: Internally Flawless–VVS1 Cut: Very

Category

21st Century and Contemporary European Aesthetic Movement Chain Necklaces

Materials

Diamond, Gold, 14k Gold, White Gold, Yellow Gold

Emilio Jewelry Gia Certified 30.00 Carat Emerald Cut Diamond Necklace
Emilio Jewelry Gia Certified 30.00 Carat Emerald Cut Diamond Necklace

Emilio Jewelry Gia Certified 30.00 Carat Emerald Cut Diamond Necklace

By Emilio!

Located in New York, NY

available. Approximate t.w.=30.00ct Approximate size of each diamond: .30ct or 1/3 ct Length: 17inches

Category

21st Century and Contemporary Choker Necklaces

Materials

Diamond, White Diamond, 18k Gold

GIA Certified 6.14 Carat Emerald Cut Diamond Engagement Platinum Ring
GIA Certified 6.14 Carat Emerald Cut Diamond Engagement Platinum Ring

GIA Certified 6.14 Carat Emerald Cut Diamond Engagement Platinum Ring

Located in Chicago, IL

total weight of 1 ct. These side diamonds are graded E-F in color and have a VS1 clarity rating

Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Elegant 0.7ct Pear Diamond Necklace in Radiant 18K White Gold
Elegant 0.7ct Pear Diamond Necklace in Radiant 18K White Gold

Elegant 0.7ct Pear Diamond Necklace in Radiant 18K White Gold

Located in רמת גן, IL

(internally flawless), radiates exceptional brilliance and fire with its unique teardrop shape. Dazzling 0.18

Category

2010s Israeli Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Recent Sales

Victorian 1.60 Carat Old Cut Diamond Rare Trilogy Ring 18 Karat/Silver
Victorian 1.60 Carat Old Cut Diamond Rare Trilogy Ring 18 Karat/Silver

Victorian 1.60 Carat Old Cut Diamond Rare Trilogy Ring 18 Karat/Silver

Located in Napoli, IT

making a statement ring Centre is a Cushion cut Old Mine cut Diamond internally flawless except a tiny

Category

Antique 1880s Victorian Three-Stone Rings

Materials

Diamond, 18k Gold, Silver

Vintage 1990s Certified Untreated 3.2 Carat Ruby Diamond Gold Cocktail Ring
Vintage 1990s Certified Untreated 3.2 Carat Ruby Diamond Gold Cocktail Ring

Vintage 1990s Certified Untreated 3.2 Carat Ruby Diamond Gold Cocktail Ring

Located in Berlin, Berlin

, approx. 0,90 ct altogether, Top Wesselton/G – Wesselton/H, if (internally flawless) – si White gold 750

Category

1990s Unknown Retro Dome Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

Marquise Moonstone Drop Earrings in Cobalt Blue Zirconium by Zoltan David
Marquise Moonstone Drop Earrings in Cobalt Blue Zirconium by Zoltan David

Marquise Moonstone Drop Earrings in Cobalt Blue Zirconium by Zoltan David

By Zoltan David

Located in Austin, TX

diamonds are D to F in color and Internally Flawless to VVS in clarity, with ideal proportions and a total

Category

2010s American Contemporary Drop Earrings

Materials

Diamond, Moonstone, Platinum, Stainless Steel

GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style Engagement Ring 18K Gold
GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style Engagement Ring 18K Gold

GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style Engagement Ring 18K Gold

Located in Bangkok, TH

approximately 1 carat with D color and IF clarity. The space between the bezel setting of the main diamond are

Category

21st Century and Contemporary Thai Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style Engagement Ring 18K Gold
GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style Engagement Ring 18K Gold

GIA 1 Ct Marquise Diamond Blue Sapphire Art Deco Style Engagement Ring 18K Gold

Located in Bangkok, TH

approximately 1 carat with D color and IF clarity. The space between the bezel setting of the main diamond are

Category

21st Century and Contemporary Thai Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Exceptional 2 Carat Cushion Diamond Ring in 18K White Gold
Exceptional 2 Carat Cushion Diamond Ring in 18K White Gold

Exceptional 2 Carat Cushion Diamond Ring in 18K White Gold

Located in רמת גן, IL

carat cushion modified brilliant diamond, boasting exceptional fire and scintillation. This internally

Category

2010s Israeli Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Tiffany & Co. 18k Gold Platinum Round Diamond 1.09ct I IF Engagement Ring
Tiffany & Co. 18k Gold Platinum Round Diamond 1.09ct I IF Engagement Ring

Tiffany & Co. 18k Gold Platinum Round Diamond 1.09ct I IF Engagement Ring

By Tiffany & Co.

Located in New York, NY

round brilliant diamond center weighing 1.09 carats I color , Very Fine IF ( Internally Flawless

Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, 18k Gold, Platinum

New African IF 3.10 Ct Color Changing Blue Purple Sapphire Sterling Pendant
New African IF 3.10 Ct Color Changing Blue Purple Sapphire Sterling Pendant

New African IF 3.10 Ct Color Changing Blue Purple Sapphire Sterling Pendant

Located in Eagan, MN

rated IF (Internally Flawless) stone. A gorgeous, very high quality stone. I love the way it changes

Category

2010s Unknown Art Deco Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Purple Sapphire, Silver, Sterling Silver

New Brazilian IF 13.2 ct Purple Blue Ametrine Sterling Necklace Adj Chain
New Brazilian IF 13.2 ct Purple Blue Ametrine Sterling Necklace Adj Chain

New Brazilian IF 13.2 ct Purple Blue Ametrine Sterling Necklace Adj Chain

Located in Eagan, MN

This beautiful stone is from Brazil . The IF stands for "Internally Flawless". It is a very high

Category

2010s Unknown Art Deco Pendant Necklaces

Materials

Amethyst, Sapphire, Gold Plate, Yellow Gold, Sterling Silver

New African IF Champagne Morganite & White Sapphire Sterling Earrings
New African IF Champagne Morganite & White Sapphire Sterling Earrings

New African IF Champagne Morganite & White Sapphire Sterling Earrings

Located in Eagan, MN

These are stud earrings. The IF means it is Internally Flawless. The stones were mined in Africa

Category

2010s Unknown Art Deco Stud Earrings

Materials

Sapphire, Morganite, Silver, Sterling Silver

Tiffany & Co. Harmony Platinum and Diamond Ring 1.02 Carat Internal Flawless
Tiffany & Co. Harmony Platinum and Diamond Ring 1.02 Carat Internal Flawless

Tiffany & Co. Harmony Platinum and Diamond Ring 1.02 Carat Internal Flawless

By Tiffany & Co.

Located in Middletown, DE

INVESTMENT grade being INTERNAL FLAWLESS and Triple Excellent Cut, Polish and Symmetry with No Fluorescence

Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Vintage circa 1970 Certified 3.62 Carat Emerald and 4.48 Ct Diamond Cluster Ring
Vintage circa 1970 Certified 3.62 Carat Emerald and 4.48 Ct Diamond Cluster Ring

Vintage circa 1970 Certified 3.62 Carat Emerald and 4.48 Ct Diamond Cluster Ring

Located in Berlin, Berlin

of marquise-cut diamonds in very good clarities (internally flawless to very small inclusions). Both

Category

Vintage 1970s Italian Retro Cluster Rings

Materials

Diamond, Emerald, 18k Gold, White Gold

Platinum Colorless 1.56 Carat Emerald Cut Diamond Solitaire Engagement Ring
Platinum Colorless 1.56 Carat Emerald Cut Diamond Solitaire Engagement Ring

Platinum Colorless 1.56 Carat Emerald Cut Diamond Solitaire Engagement Ring

Located in Columbia, MO

Main Stone Clarity IF (Internally Flawless) Natural/Lab-Created Natural Main Stone Diamond Main Stone

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified Canadian Diamond and 18 Karat Gold Ring
GIA Certified Canadian Diamond and 18 Karat Gold Ring

GIA Certified Canadian Diamond and 18 Karat Gold Ring

By Thesis Gems and Jewelry

Located in Berkeley, CA

: Canadian VS1/D 0.58 ct, and Internally flawless/F 0.52 ct. Invest in diamonds that you can wear all the

Category

2010s American Artisan Engagement Rings

Materials

White Diamond, 18k Gold

Tiffany & Co. Platinum and Diamond Princess Cut Ring 1.11 Carat H IF New
Tiffany & Co. Platinum and Diamond Princess Cut Ring 1.11 Carat H IF New

Tiffany & Co. Platinum and Diamond Princess Cut Ring 1.11 Carat H IF New

By Tiffany & Co.

Located in Middletown, DE

For your consideration is a BRAND NEW Tiffany & Co Princess cut 1 carat natural diamond solitaire

Category

2010s American Engagement Rings

Materials

Diamond, White Diamond, Platinum

Tiffany & Co. Platinum and Diamond Round Engagement Ring .86 Carat H VVS2
Tiffany & Co. Platinum and Diamond Round Engagement Ring .86 Carat H VVS2

Tiffany & Co. Platinum and Diamond Round Engagement Ring .86 Carat H VVS2

By Tiffany & Co.

Located in Middletown, DE

diamond encrusted halo setting of an additional .22 D-G color and Internal Flawless-VS2 carats of diamonds

Category

2010s American Engagement Rings

Materials

White Diamond, Platinum

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$10,000

W 1.11 in L 1.78 in

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Located in Idar-Oberstein, DE

A beautiful Diamond Ribbon Bow Brooch with ca. 7 carats of diamonds (D-F/IF-VVS).

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1 Ct Internally Flawless Diamond For Sale on 1stDibs

Surely you’ll find the exact 1 ct internally flawless diamond you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Each design created in this style — which was crafted with great care and often made from Platinum, 18k Gold and Gold — can elevate any look. Our collection of these items for sale includes 1 vintage editions and 10 modern creations to choose from as well. Making the right choice when shopping for a 1 ct internally flawless diamond may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 20th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. Finding an appealing 1 ct internally flawless diamond — no matter the origin — is easy, but Antinori Fine Jewels, J. Birnbach and Tiffany & Co. each produced a popular version that is worth a look. See these pages for an emerald cut iteration of this accessory, while there are also oval cut cut and round cut cut versions available here, too. If you’re browsing our inventory for a 1 ct internally flawless diamond, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a 1 Ct Internally Flawless Diamond?

On average, a 1 ct internally flawless diamond at 1stDibs sells for $54,000, while they’re typically $8,393 on the low end and $3,200,000 for the highest priced versions of this item.

The Legacy of Diamond in Jewelry Design

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 ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.