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GIA Certified Unheated Purple Sapphire and Diamond Engagement Ring, 2.14 Carats
By Sarosi By Timeless Gems
Located in Los Angeles, CA
natural medium purple color with lovely pinkish highlights. It is a modified emerald-cut with brilliant
Category

21st Century and Contemporary American Artisan Engagement Rings

Materials

Diamond, Sapphire, Purple Sapphire, Rose Gold, Platinum, Gold, 18k Gold

Tiffany Co. Engagement Solitaire Platinum Diamond Ring
By Tiffany Co.
Located in Chicago, IL
Authentic Tiffany & Co. 1.08 ct Platinum Princess Brilliant Cut Diamond Solitaire Engagement Ring
Category

2010s American Cocktail Rings

Materials

Diamond, White Diamond, Platinum

Antique 14K Yellow Gold Oval Burma Sapphire Three Stone Diamond Cocktail Ring
Located in Houston, TX
: Modified Brilliant Cut Transparency: Transparent Color(s): Blue Grading Report: GIA Lab Report #6224519746
Category

Early 20th Century Burmese Cocktail Rings

Materials

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

GiA Certified 4.01 Carat Natural Light Yellow Diamond Drop Pendant Necklace
Located in Baltimore, MD
& yellow gold Weight: 8.37 grams GIA report number: 2235776322 Yellow diamond: Cut cornered square modified
Category

21st Century and Contemporary North American Modern Pendant Necklaces

Materials

Diamond, Yellow Diamond, Yellow Gold, Platinum

3.00 Carat Natural Princess Diamond Ring with 0.75ctw Pave Round Diamond Band
Located in Aventura, FL
Style: Square Modified Brilliant Princess Cut Color Grade: F Clarity Grade: SI1 Pave Diamond Band
Category

21st Century and Contemporary American Modernist Wedding Rings

Materials

Diamond

Natural Fancy Pink Color GIA Certified Diamond Bracelet
Located in New York, NY
Fancy Pink and White Diamond Bracelet. Set with eight pink color cut-cornered rectangular, square
Category

Late 20th Century Unknown Artist Link Bracelets

Materials

Diamond, Pink Diamond, Rose Gold, Platinum

Contemporary 11.02 CTW Party Color Sapphires Diamond 18K Gold Bracelet
Located in Philadelphia, PA
yellow colors Each link centers a bezel set round brilliant cut diamonds Weighing approximately 0.52
Category

21st Century and Contemporary Contemporary Link Bracelets

Materials

Diamond, Sapphire, Gold, 18k Gold

Tiffany Co. True 2.27 Carat H/VS1 Platinum Diamond Engagement Ring
By Tiffany Co.
Located in Chicago, IL
highlight the beauty of the diamond. This ring showcases a square-modified brilliant Tiffany True diamond
Category

2010s American Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 6.16 Carat Fancy Yellow Diamond Platinum 18K Yellow Gold Ring
By Antinori Fine Jewels
Located in Chicago, IL
vibrant diamond ring featuring a GIA Certified 6.16 Carat Cut-Cornered Square Modified Brilliant Diamond
Category

2010s Italian Contemporary Engagement Rings

Materials

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

GIA Certified 10 Carat Fancy Yellow Diamond Engagement Ring
By Antinori Fine Jewels
Located in Chicago, IL
proportioned cut-cornered square modified brilliant. The color is natural, evenly distributed, and displays an
Category

2010s American Contemporary Engagement Rings

Materials

Yellow Diamond, Gold, Platinum

GIA Certified 5.32 Carat Fancy Yellow VS2 Diamond Ring with Tapered Baguettes
By Antinori Fine Jewels
Located in Chicago, IL
hue with even color distribution. This exquisite cut-cornered square modified brilliant diamond
Category

2010s Italian Contemporary Engagement Rings

Materials

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

GIA Certified 8 ct Fancy Yellow Diamond Stud Earrings in 18K Yellow Gold
By Antinori Fine Jewels
Located in Chicago, IL
natural Fancy Yellow diamonds, each cut in a cut-cornered square modified brilliant (radiant style). The
Category

2010s Italian Contemporary Stud Earrings

Materials

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

GIA Certified 3.01 Carat E/VS1 Diamond Platinum Three Stone Engagement Ring
Located in Miami, FL
GIA certified 3.01 carat natural cushion modified brilliant diamond three stone engagement ring in
Category

21st Century and Contemporary Modern Three-Stone Rings

Materials

Diamond, Platinum

GIA Certified 3.01 Carat E/VS1 Diamond Platinum Three Stone Engagement Ring
Located in Miami, FL
GIA certified 3.01 carat natural cushion modified brilliant diamond three stone engagement ring in
Category

21st Century and Contemporary American Modern Three-Stone Rings

Materials

Diamond, Platinum

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

New Platinum GIA 2.58ctw Princess Diamond Sapphire Solitaire Engagement Ring
Located in Montclair, NJ
Diamonds - Round Brilliant Cut - Pave Set - G/H Color - VS1/VS2 Clarity - 0.40ctw (exact) (2) Natural
Category

2010s American Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 0.56 Carat Light Pink SI2 Clarity Diamond
Located in บางรัก, TH
"modified" cuts, the cushion diamond offers a blend of vintage charm and modern brilliance. The larger
Category

2010s Asian Loose Gemstones

Materials

Diamond

Peter Suchy GIA 3.31 Carat Yellow Sapphire Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
G, VS1 2 square brilliant cut diamonds, approx. total weight .10cts, G, VS Size 6.5 and sizable
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Sapphire, Yellow Sapphire, Platinum

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

Vintage Platinum GIA 3.65ctw No Heat Long Cushion Old Step Sapphire Diamond Ring
Located in Montclair, NJ
Info ** (6) Natural Genuine Diamonds - Square Carre Step Cut & Round Brilliant Cut - Channel & Prong
Category

20th Century Cocktail Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 1.33 Carat S - T Colour VVS2 Clarity Diamond
Located in บางรัก, TH
due to its brilliant facets, maximizing fire. Depending on the cut quality, this diamond will exhibit
Category

2010s Asian Loose Gemstones

Materials

Diamond

Custom Princess and Round Cut Moissanite Wide Band Ring in 14 Karat Yellow Gold
Located in Scottsdale, AZ
value. Metal: 14 Karat Yellow Gold Gemstones: Moissanite Moissanite Cut: Round and Square Modified
Category

21st Century and Contemporary Unknown Contemporary Fashion Rings

Materials

Gold, 14k 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

18k Yellow Gold AGL 3.56ctw Fancy Pink Orange Ceylon Sapphire Diamond Ring
Located in Montclair, NJ
Complete Info ** Natural Genuine Diamonds - 26 Round Brilliant Cut & 8 Square Step Cut - Pave & Channel Set
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Pink Sapphire, Gold, 18k Gold, Yellow Gold

Colombian emerald diamond ring 18KT yellow gold RARE natural emerald 6.98ct
Located in Boca Raton, FL
gemstone and the ring. Metal Type: 18KT Natural Diamond(s): Color: F-G Cut:Round Brilliant Carat: 1.40ct
Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond, Emerald

Mid-Century 14K White Gold, Aquamarine, Marquise Diamond Halo Cocktail Ring
Located in Philadelphia, PA
prong-set square cushion modified brilliant cut 11.30± ct aquamarine (transparency: transparent, color
Category

20th Century Unknown Modern Cocktail Rings

Materials

Aquamarine, Diamond, 14k Gold, White Gold

GIA Unheated Greenish-Blue Sapphire Diamond Ring in 18K Two-Tone Gold
Located in Miami, FL
adorned with a row of square modified brilliant diamonds on either side. This combination of precision-cut
Category

Early 2000s Engagement Rings

Materials

Diamond, Blue Sapphire, Gold

Tiffany Co Lucida Platinum Diamond Engagement Ring 0.46 tc E VVS1
By Tiffany Co.
Located in San Diego, CA
: 5.5 - sizable Total Carat Weight: 0.46 cts Diamond Shape: Cut Corner Square Modified Brilliant
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Frosted White Topaz and Diamond Halo Dangle Earrings in 18 Karat Yellow Gold
Located in Scottsdale, AZ
, set with modified square emerald-cut frosted white topaz stones. The clean lines of the topaz are
Category

21st Century and Contemporary Unknown Contemporary Dangle Earrings

Materials

Diamond, Topaz, Gold, 18k Gold, Yellow Gold

Solid Gold GIA 7.52ctw Colombian Emerald Diamond Button Clip On Earring
Located in Montclair, NJ
Emeralds ** (62) Natural Genuine Diamonds - Round Brilliant & Square Step Cut - Pave & Channel Set - G/H
Category

21st Century and Contemporary Clip-on Earrings

Materials

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

Tiffany Co. Grace Princess Diamond Engagement Ring 0.76 Tcw E VVS1 Platinum
By Tiffany Co.
Located in San Diego, CA
: Square Modified Brilliant ( Princess Cut ) Diamond 0.61 cts Color & Clarity: E, VVS1 Inscription: Crown
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

GIA Certified 0.40 Carat Fancy Light Purplish Pink SI2 Clarity Diamond
Located in บางรัก, TH
. Our cushion shaped diamond is a timeless and sophisticated cut known for its rounded edges and square
Category

2010s Asian Loose Gemstones

Materials

Diamond

Bespoke Bespoke 14ct White Gold Ruby Diamond Set "Art-Deco" Ring 4.62ct
Located in SYDNEY, NSW
Brilliant Cut Diamond, H-I Colour, P2 Clarity, weighing 2.02ct. Accompanied by 38 Square French Cut Rubies
Category

21st Century and Contemporary Art Deco Cocktail Rings

Materials

Diamond, Ruby, 14k Gold, White Gold

GIA Certified 1.51 Carat Fancy Light Brown Pink Internally Flawless Diamond Ring
By Gad Co.
Located in Miami, FL
GIA Certified 0.51 Carat Radiant Cut Fancy Light Brownish Pink Internally Flawless Diamond With
Category

21st Century and Contemporary North American Contemporary Engagement Rings

Materials

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

Mens Diamond Cross and Engraved Scripture Large Signet Ring 14 Karat Yellow Gold
Located in Scottsdale, AZ
engraved with a meaningful scripture and adorned with six modified square emerald-cut diamonds arranged in
Category

21st Century and Contemporary Unknown Contemporary Signet Rings

Materials

Diamond, Gold, 14k Gold, Yellow Gold

Princess Halo Twisted Diamond Engagement Ring 14 Karat White Gold 1 Carat
Located in San Diego, CA
: 6.5 - sizable Total Carat Weight: 1.00 tcw Center Diamond Shape: Princess Cut ( Square Modified
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Peter Suchy GIA 2.02 Carat Diamond Platinum Split Shank Engagement Ring
By Peter Suchy
Located in Stamford, CT
are protected by the rounded edges. GIA Certificate # 17474991 1 square princess cut ideal modified
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Platinum

Glamorous 18k Yellow Gold Solitaire Ring w/ 0.80 ct Natural Diamonds IGI Cert
Located in רמת גן, IL
A gorgeous solitaire ring with a dazzling 0.8-carat square cushion-modified brilliant diamond. The
Category

2010s Israeli Solitaire Rings

Materials

Diamond, 18k Gold, Yellow Gold

NEW 18k Gold 1.10ct GIA Princess Diamond Solitaire Knife Edge Engagement Ring
Located in Montclair, NJ
Cutting Style: Square Modified Brilliant Measurements: 5.73 x 5.55 x 4.20 mm Carat Weight: 1.10 carat
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Spectra Fine Jewelry GIA Certified 10.11 Carat Yellow Diamond Halo Ring
By Spectra Fine Jewelry
Located in New York, NY
gold and features a cut-cornered rectangular modified brilliant, or radiant-cut yellow diamond with an
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Yellow Diamond, 18k Gold, White Gold

Spectra Fine Jewelry 23.51 Carat Certified Colombian Emerald Diamond Ring
By Spectra Fine Jewelry
Located in New York, NY
diamonds, each held with four talon prongs, and alternate with smaller pairs of round brilliant-cut
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, White Gold

GIA Certified 13 Carat Colombian Emerald Princess Diamond Unisex Ring in 18k
Located in Miami, FL
a yellow metal ring with numerous near-colorless square modified brilliant. Species: Natural Beryl
Category

Early 2000s Colombian Art Deco Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

Collar Necklace of 18K Gold Openwork Plaque Links Set w Diamonds "Big 3" Gems
Located in Sherman Oaks, CA
are all brilliant cut rounds pavé-set in little white gold square plates. They're good quality (G-H
Category

Late 20th Century American Contemporary Choker Necklaces

Materials

Diamond, White Diamond, Emerald, Ruby, Sapphire, Blue Sapphire, Gold, 18...

Sebastian Bernards EGL 2.08 Ct K/VS2 Pave Set 18 Karat Engagement Ring with Halo
By Sebastian Bernard
Located in Los Angeles, CA
A Beautiful K/VS2 EGL Certified 2.08 Ct Square Cushion Cut Natural center Diamond set in a
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Yellow Diamond, 18k Gold

2.9 Carat Pink Tourmaline Engagement Ring with Baguettes in Platinum Gold
Located in Sherman Oaks, CA
cushion-shaped with a modified brilliant cut and measures just under 9mm square with a weight of 2.9
Category

Mid-20th Century Unknown Art Deco Three-Stone Rings

Materials

Diamond, White Diamond, Tourmaline, Gold, 14k Gold, White Gold, Platinum

Rare GIA Certified 50 Carat Greenish Blue Zircon Pendant In 18K and Platinum
Located in Miami, FL
GIA certified brilliant cushion cut greenish blue zircon and diamond pendant necklace. The pendant
Category

21st Century and Contemporary North American Art Deco Pendant Necklaces

Materials

Diamond, Zircon, Blue Zircon, 18k Gold, Yellow Gold, Platinum

Tiffany Co. Ruby Ring
Located in Sausalito, CA
Tiffany & Co. Lady's platinum ring with 1 square modified brilliant cut ruby & 22 round brilliant
Category

20th Century Fashion Rings

GIA Certified Square Modified Brilliant Cut Diamond 2.03 Carat
Located in Surfside, FL
ESTIMATED RETAIL: $45,750.00 G&S PRICE: $34,160.00 GIA certified square modified brilliant cut
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

Loose Diamond, 0.93ct, GIA Certified, Square Modified Brilliant Cut
Located in Vienna, VA
Loose Diamond, 0.93ct, GIA Certified, Square Modified Brilliant Cut Loose Square Modified
Category

Antique 15th Century and Earlier Loose Gemstones

Materials

Diamond

14K Yellow Gold 0.91ctw Diamond Band Ring, Size 8 Square Modified Brilliant
Located in Holtsville, NY
fine jewelry collection. Featuring 14 square modified brilliant diamonds with a total carat weight of
Category

2010s American Artist Band Rings

Materials

Diamond, Yellow Gold

1.07 Carat Loose J / I1 Square Modified Brilliant Diamond GIA Certified
Located in Sherman Oaks, CA
Diamond General Info Diamond Cut: Princess Cut Measurements: 6.29 x 6.16 - 4.16 Diamond
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

GIA Certified Modified Brilliant Cut Diamond 5.17 Carat 18k White Gold Ring
Located in Surfside, FL
GIA certified cushion modified brilliant cut diamond 5.17 carat ( G color, SI2 clarity) ring
Category

20th Century Engagement Rings

Materials

White Gold

GIA Certified Princess Cut Diamond Platinum Solitaire Ring
Located in Surfside, FL
GIA certified Princess Cut (square modified brilliant cut) natural diamond 4.67 ct. F color, VS2
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

GIA Certified Square Emerald Cut Diamond 4.08 Carat Platinum Ring
Located in Surfside, FL
GIA certified 4.00 carat Natural Fancy Yellow Even, Cut Cornered Square Modified Brilliant Diamond
Category

20th Century Engagement Rings

Materials

Platinum

Platinum and 18k Gold Diamond Ring with App. 1.50 Cts in Brilliant Cut Diamonds
Located in Surfside, FL
square cut diamonds (0.24 to 0.26 carats each) with app. 1.50 carats total weight (F-G-H color
Category

20th Century Engagement Rings

Materials

Yellow Gold, 18k Gold, Platinum

9.05 Carat Fancy Intense Yellow Square Radiant Diamond Engagement Ring
By Prestigious New York Jeweler
Located in Lakewood, NJ
: Shape: Cut-Cornered Square Modified Brilliant (Modified Square Radiant Cut) Carat weight: 9.05
Category

Mid-20th Century American Contemporary Engagement Rings

Materials

Diamond, White Diamond, Yellow Diamond, Platinum

Certified Radiant Cut Diamond and Round Diamond Engagement Ring 18 Carat Gold
Located in Hamilton, AU
certified square Radiant diamond (also known as a cut cornered square modified brilliant) is 0.90 carat, and
Category

21st Century and Contemporary Australian Contemporary Engagement Rings

Materials

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

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Modified Brilliant Cut Square Diamond For Sale on 1stDibs

You are likely to find exactly the modified brilliant cut square diamond you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using gold, 18k gold and yellow gold. In our selection of items, you can find a vintage example as well as a contemporary version. You’re likely to find the perfect modified brilliant cut square diamond among the distinctive items we have available, which includes versions made as long ago as the 18th Century as well as those produced as recently as the 21st Century. There have been many well-made iterations of the classic modified brilliant cut square diamond over the years, but those made by Tiffany Co., Graff and Peter Suchy are often thought to be among the most beautiful. Today, if you’re looking for a princess cut version of this piece and are unable to find the perfect match, our selection also includes square cut and radiant cut alternatives. Finding a modified brilliant cut square diamond for sale for women should be easy, but there are 54 pieces available to browse for unisex as well as men, too.

How Much is a Modified Brilliant Cut Square Diamond?

On average, a modified brilliant cut square diamond at 1stDibs sells for $13,192, while they’re typically $1 on the low end and $560,000 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.