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GIA Certified 4 Carat Fancy Yellow Internally Flawless Cushion Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
Modified Brilliant diamond, Internally Flawless, mounted in an elegant combination of 18K yellow gold and
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Yellow Gold, Platinum

18 Karat White Gold Diamond Solitaire Ring
Located in Macau, MO
A square modified brilliant diamonds weighing 2.00 carats, mounted in 18 karat white gold. A very
Category

2010s Hong Kong Contemporary Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

GIA Certified 3 Carat VVS2 Fancy Vivid Yellow Diamond Engagement Ring
Located in Chicago, IL
This exquisite engagement ring features a stunning 3.01-carat cushion modified brilliant diamond
Category

2010s American Contemporary Engagement Rings

Materials

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

GIA Natural 6.35 Carat Pear Shape Diamond 18-Karat Bezel Set Pendent In Stock
Located in Boca Raton, FL
GIA 18k White Gold Natural 6.35 Carat Modified Pear Shape Diamond Bezel Set Pendant We have the
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

8.02-carat GIA Certified Diamond Ring 18k White Gold Modern Jewelry
Located in Beverly Hills, CA
A modern 18k white gold diamond ring with GIA certified cut-cornered rectangular modified brilliant
Category

21st Century and Contemporary Unknown Cocktail Rings

Materials

Diamond, White Gold, 18k Gold

GIA Certified 0.96 Carat Square Brilliant D Color VS2 Clarity Natural Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NY56227 Stone Shape: SQUARE MODIFIED BRILLIANT Diamond Weight: 0.96ct
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, White Diamond

Cartier Lanieres 18K Yellow Gold Diamond and Pink Sapphire Ring
By Cartier
Located in Braintree, GB
Cartier Lanieres 18K Yellow Gold Diamond and Pink Sapphire Ring. A striking and contemporary wide
Category

Early 2000s French Band Rings

Materials

Diamond, Pink Sapphire, 18k Gold, Yellow Gold

Vintage Diamond Sapphire Platinum 18 KT Cluster Earrings
Located in Napoli, IT
Art Deco Diamond Sapphire latter modified into earclips, top are of solid Platinum, ear back clips
Category

Vintage 1920s European Art Deco Clip-on Earrings

Materials

Diamond, Sapphire, 18k Gold, Platinum

GIA Certified 0.90 Carat Oval Brilliant D Color Vs2 Clarity Natural Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC56500 Stone Shape: OVAL MODIFIED BRILLIANT Diamond Weight: 0.90ct
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, White Diamond

18 kt. White Gold Enhanced Pink Diamond Heart 2.78 ct. Ring, GIA Certificate
Located in Antwerp, BE
Heart modified brilliant, Fancy pink enhanced diamond , 2.78 ct. VVS1 Comes with GIA certificate
Category

21st Century and Contemporary Belgian Artisan Cluster Rings

Materials

Diamond, Pink Diamond, White Gold, 18k Gold

Sparkling 1pc Natural Diamond with 1.03 Carat Cushion G VS1 GIA Certificate
Located in רמת גן, IL
A sparkling natural cut cushion modified brilliant diamond in a 1.03 carat G VS1 excellent cut
Category

2010s Israeli Loose Gemstones

Materials

Diamond

Dazzling 1pc Natural Diamond w/ 1.00 ct Cushion F VVS2 GIA Certificate
Located in רמת גן, IL
One sparkling cushion modified brilliant cut natural diamond in a 1-carat F VVS2 with excellent
Category

2010s Israeli Loose Gemstones

Materials

Diamond

Dazzling 1 Pc Natural Diamond 1.01 Carat Cushion D VVS2 GIA Certificate
Located in רמת גן, IL
One shimmering and sparkling modified Brilliant Cushion cut diamond in a 1.01 carat D VVS2 with
Category

2010s Israeli Loose Gemstones

Materials

Diamond

GIA Natural Horse Head Diamond Halo Pendant 14-Karat Necklace In Stock
By Raymond Lee Jewelers
Located in Boca Raton, FL
Diamond Details: GIA Certified 4.06 Carat Modified Brilliant Horse Shaped Diamond. The color is Fancy Deep
Category

2010s American Modern Pendant Necklaces

Materials

Brown Diamond, Diamond, Pink Diamond, 14k Gold, Rose Gold, Gold

Tacori GIA Princess 1.32 Diamond Platinum Split Shank Engagement Ring
By Tacori
Located in Miami, FL
measuring 6mm x 7mm. Showcasing a GIA lab-reported square modified brilliant, prong-set diamond weighing
Category

21st Century and Contemporary Modern Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.56 Carat Yellow Diamond 18 Karat White Gold Ring
Located in London, GB
This Gorgeous GIA Certified 1.13 Carat natural fancy deep brownish greenish-yellow cushion modified
Category

2010s British Modern Engagement Rings

Materials

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

Yellow and white diamond art deco drop pendant 18k white gold
Located in London, GB
diamond centre trillion pentagon cut modified IGI certified diamond total weight 0.85ct, additional
Category

21st Century and Contemporary British Art Deco Drop Necklaces

Materials

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

GIA 1.41 Carat Brown Yellow Cushion Diamond Gold Platinum Engagement Ring
Located in Stamford, CT
Brown and yellow diamond engagement ring. Antique cushion cut natural fancy brownish yellow bezel
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Yellow Diamond, Brown Diamond, Gold, 18k Gold, Yellow Gold, Pla...

GIA Certified 4.02 Carat Fancy Yellow Cushion Cut Diamond Ring VS2 Clarity
By Antinori Fine Jewels
Located in Chicago, IL
This exquisite ring showcases a GIA Certified 4.02 carat Fancy Yellow cushion modified brilliant
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, White Gold, Yellow Gold

Sparkling 1 pc Natural Diamond with 0.90 ct D IF, IGI Certificate
Located in רמת גן, IL
1 pcs Diamond - 0.90 ct - Cushion - D (colourless) - IF (flawless) IGI Natural cushion-modified
Category

2010s Israeli Loose Gemstones

Materials

Diamond

Antique Diamond and Mother of Pearl Stud Set
Located in Riverdale, NY
quality diamonds are antique modified square cuts on the borders and each button is centered by an old
Category

Early 20th Century French Edwardian Cufflinks

Materials

Diamond, 18k Gold, Platinum

Tiffany Co. Legacy Cushion Diamond 1.33 Tcw Halo Engagement Ring Platinum
By Tiffany Co.
Located in San Diego, CA
Metal: Platinum PT950 Size: 6 TCW: 1.33 tcw Main Diamond: Cushion Modified Brilliant Diamond 1.00
Category

2010s Engagement Rings

Materials

Diamond, Platinum

GIA Certified 2.01 Carat White Gold Diamond Engagement Ring
Located in Beverly Hills, CA
cushion modified brilliant-cut diamond, prong-set to highlight its radiant brilliance. With J color and SI
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

Diamond, 14k Gold, White Gold

1 pc Natural Diamond - 0.71 ct - Cushion - J - VS1- GIA Certificate
Located in רמת גן, IL
Natural cushion modified brilliant diamond in a 0.71 carat J VS1 with excellent cut and extremely
Category

2010s Israeli Loose Gemstones

Materials

Diamond

18k Gold GIA 1.98ctw Fancy Intense Orange Yellow Diamond Natural Engagement Ring
Located in Montclair, NJ
Strong Pure Fiery Color! Must see! --Stone(s):-- (1) Natural Genuine Diamond - Cushion Modified
Category

21st Century and Contemporary Three-Stone Rings

Materials

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

GIA Certified 3.24 Carat Radiant Cut Fancy Yellow Diamond Ring in 18K W/Y Gold
By Antinori Fine Jewels
Located in Chicago, IL
, enriching its brilliance with a refined radiance. The cut-cornered rectangular modified brilliant diamond
Category

2010s American Contemporary Engagement Rings

Materials

Yellow Diamond, White Diamond, Diamond, Yellow Gold, White Gold, 18k Gol...

20.5 Carats Champagne Topaz with Diamond Paradizia Ring
By Paradizia
Located in Laguna Beach, CA
diamond design. Item #R166 Materials and Weight Topaz, 20.5 carats, 20.5x13x9.8, modified brilliant
Category

21st Century and Contemporary American Artisan Cocktail Rings

Materials

Diamond, Topaz, 14k Gold, Gold Plate, Yellow Gold

TIffany Co. engagement ring features a 2.01 ct Princess Diamond Ring
By Tiffany Co.
Located in Chicago, IL
Modified) Brilliant Cut diamond with an H color grade and VS1 clarity. It exhibits excellent cut quality
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Certified 0.41 Carat Fancy Light Pinkish Purple VS2 Clarity Diamond
Located in บางรัก, TH
different cuts, such as the classic or modified pear. Our 0.41 carat diamond is a small yet stunning
Category

2010s Asian Loose Gemstones

Materials

Diamond

Gubelin Certified 2.11 Carat Burma No Heat Sapphire Diamond Platinum Ring
Located in Kowloon, HK
-cut diamonds, this piece epitomizes the pinnacle of fine jewelry craftsmanship. The sapphire
Category

2010s Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 1.20 Carat Yellow Diamond Unique Engagement Cocktail Ring Gift
Located in Hong Kong, HK
Product Specifications: Center Stone: 1.20ct Cushion Cut Modified Brilliant Diamond with GIA
Category

2010s Modern Engagement Rings

Materials

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

GIA Certified 0.57 Carat Cushion Yellow Diamond Ring in Platinum
Located in London, GB
This Phenomenal Masterpiece features an exquisite 0.57 Carat Cushion Modified Brilliant Diamond of
Category

21st Century and Contemporary Engagement Rings

Materials

Yellow Diamond, Platinum

GIA Certified 5.01 Carat Fancy Yellow Cushion Diamond Ring in Platinum
By Antinori Fine Jewels
Located in Chicago, IL
A striking and sophisticated cocktail ring showcasing a GIA certified 5.01 carat cushion modified
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Yellow Gold, Platinum

GIA Certified 2.4 Carat No Heat Pink Sapphire Briolette Diamond Platinum Ring
By Gad Co.
Located in Miami, FL
GIA Certified Pink Sapphire and Diamond Ring. Crafted and set in platinum, this engagement ring
Category

21st Century and Contemporary Malagasy Contemporary Engagement Rings

Materials

Pink Sapphire, White Diamond, Diamond, Platinum

0.92 Carat Oval Brilliant Gia Certified D Color VS2 Clarity Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC56500 Stone Shape: OVAL MODIFIED BRILLIANT Diamond Weight: 0.90ct
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

GIA Certified 1.20 Carat Cushion Cut Light Yellow Diamond Unique Engagement Ring
Located in Hong Kong, HK
Product Specifications: Center Stone: 1.20ct Cushion Cut Modified Brilliant Diamond with GIA
Category

2010s Modern Engagement Rings

Materials

White Diamond, Yellow Diamond, 14k Gold

Sparkling 2pcs Natural Diamonds with 1.50ct Cushion E-F VS1 VVS2 GIA Certificate
Located in רמת גן, IL
A pair of sparkling natural cut cushion-modified brilliant diamonds in a 1.5 carat E-F VS1-VVS2
Category

2010s Israeli Loose Gemstones

Materials

Diamond

Hand Engraved 14K Gold Diamond Cigar Band - .44 Carat VVS2
Located in Hummelstown, PA
rectangular modified brilliant-cut diamond mounted in a hand fabricated 14 karat yellow gold setting, which
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold

EXTREMELY RARE! GIA Certified 2.02 Carat Lozenge Kite Step cut Antique Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC57128 Stone Shape: MODIFIED LOZENGE STEP CUT Diamond Weight: 2.02 CT
Category

21st Century and Contemporary North American Art Deco Loose Gemstones

Materials

White Diamond, Diamond

0.92 Carat Cushion Brilliant Gia Certified G Color I2 Clarity Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC55795 Stone Shape: CUSHION MODIFIED BRILLIANT Diamond Weight: 0.92ct
Category

Antique 15th Century and Earlier Loose Gemstones

Materials

White Diamond

14ct Yellow Gold Sapphire Diamond Set "Art-Deco" Ring 3.52ct
Located in SYDNEY, NSW
. Featuring 1 Oval Modified Brilliant Cut Diamond, H-J Colour, P2 Clarity weighing 1.02ct. Accompanied with a
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Sapphire, 14k Gold, Yellow Gold, Rhodium

Sparkling 1 pc Natural Diamond 0.75 ct Cushion J SI1 GIA Certificate
Located in רמת גן, IL
1 Sparkling natural cushion modified cut diamond in a 0.75 carat J SI1 with excellent cut. This
Category

2010s Israeli Loose Gemstones

Materials

Diamond

0.70 Carat Cushion Brilliant Gia Certified F Color Si1 Clarity Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC56769 Stone Shape: CUSHION MODIFIED BRILLIANT Diamond Weight: 0.70ct
Category

Antique 15th Century and Earlier Loose Gemstones

Materials

White Diamond

1.02 Carat Pear Brilliant Gia Certified L Color Vs2 Clarity Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC56925 Stone Shape: PEAR MODIFIED BRILLIANT Diamond Weight: 1.02ct Clarity
Category

Antique 15th Century and Earlier Loose Gemstones

Materials

White Diamond

GIA Certified 2.05 Carat Radiant Cut Fancy Yellow Diamond Ring
Located in Chicago, IL
yellow diamond, GIA-certified for its natural origin and even color distribution. The modified
Category

2010s American Contemporary Engagement Rings

Materials

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

Fancy Cut Diamond Halo Necklace Estate 14k White Gold 16" Chain Fine Jewelry
Located in Torrance, CA
cut (modified heart shape) is estimated at 0.80 carats, accented with 26 diamonds totaling an
Category

Mid-20th Century Unknown Modern Pendant Necklaces

Materials

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

1.30 Carat GIA Certified Square Brilliant Cut Diamond Platinum Engagement Ring
Located in New York, NY
This amazing platinum engagement ring centers a unique GIA certified modified square brilliant cut
Category

20th Century Engagement Rings

Materials

Diamond, Platinum

1.00 Carat Pear Brilliant Gia Certified X Color Si1 Clarity Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC55425 Stone Shape: PEAR MODIFIED BRILLIANT Diamond Weight: 1.00ct Clarity
Category

Antique 15th Century and Earlier Loose Gemstones

Materials

White Diamond

Toi Moi Platinum Ring 2.15ct, Pear Diamond Emerald, Estate Sultan Oman
Located in Antwerp, BE
special order ! Diamond: Pear modified Brilliant cut Diamond, 2.15 ct. D Color , Comes with IGI
Category

21st Century and Contemporary European Artisan Fashion Rings

Materials

Diamond, Emerald, Platinum

Gubelin Certified 3.19 Carat No Heat Blue Sapphire Diamond Platinum Ring
Located in Kowloon, HK
-cut diamonds, this piece epitomizes the pinnacle of fine jewelry craftsmanship. The sapphire
Category

2010s Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Rare Green Tourmaline 31.60 Carats with Diamonds Paradizia Ring
By Paradizia
Located in Laguna Beach, CA
Description Impressive, large, brilliant flawless rare-color Green Tourmaline with diamonds ring
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Diamond, Tourmaline, 14k Gold, White Gold

IGI Certified 0.60ct Natural Diamond Three-Stone 18K White Gold
Located in Sant Josep de sa Talaia, IB
excellent light performance. The two side diamonds are marquise modified brilliant cuts, each measuring
Category

21st Century and Contemporary European Contemporary Three-Stone Rings

Materials

Diamond, 18k Gold, White Gold

Peter Suchy GIA Certified 1.95 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
diamonds, in a platinum setting. Made in the Peter Suchy Workshop 1 square modified brilliant diamond F
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Certified 4 Carat Fancy Yellow VS1 Diamond Earrings in 18K Yellow Gold
By Antinori Fine Jewels
Located in Chicago, IL
. Each earring features a GIA-certified oval modified brilliant cut diamond, both graded Fancy Yellow
Category

2010s American Art Deco Stud Earrings

Materials

Diamond, 18k Gold, Yellow Gold

1 Pc Natural Diamond, 1.00 Ct, Cushion, D Colorless - If Flawless , IGI
Located in רמת גן, IL
Natural square cushion modified brilliant diamond in a 1.00 carat D IF with excellent cut and
Category

2010s Israeli Loose Gemstones

Materials

Diamond

0.74 Carat Square Brilliant Gia Certified K Color I2 Clarity Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC56895 Stone Shape: SQUARE MODIFIED BRILLIANT Diamond Weight: 0.74ct
Category

Antique 15th Century and Earlier Loose Gemstones

Materials

White Diamond

GIA Certified 1.91-Carat Fancy Yellow Diamond Ring in Platinum
Located in New York, NY
1.91ct Cut Cornered Modified Brilliant Fancy Yellow Diamond Ring, GIA Certificate # 5111396659
Category

2010s American Art Deco Engagement Rings

Materials

Yellow Diamond, 18k Gold, Platinum

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Modified Diamond For Sale on 1stDibs

Surely you’ll find the exact modified diamond you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Frequently made of Gold, 18k Gold and Platinum, this item was constructed with great care. In our selection of items, you can find a vintage example as well as a contemporary version. Finding the perfect modified diamond may mean sifting through those created during different time periods — you can find an early version that dates to the 20th Century and a newer variation that were made as recently as the 21st Century. For this particular piece, .5 Carat and 1 Carat are consistently popular carat weights. A modified diamond from Khai Khai Jewelry, Antinori Fine Jewels and J. Birnbach — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for a cushion cut iteration of this accessory, while there are also trillion cut cut and round cut cut versions available here, too. If you’re browsing our inventory for a modified 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 Modified Diamond?

On average, a modified diamond at 1stDibs sells for $13,890, while they’re typically $1,325 on the low end and $415,000 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.