Platinum, Diamond and Emerald Wristwatch
Located in New York, NY
This mechanical Platinum, Diamond and Emerald Wristwatch centering an oval silver-tone dial with black Arabic numerals, within a modified rectangular diamond-set case flanked by 2 ma...
Diamond, Emerald, Platinum
GIA Certified Rectangular Modified Brilliant Loose Diamond 1.00ct
Located in Laguna Beach, CA
This loose rectangular modified brilliant diamond has a carat weight of 1.0, IF - internally flawless - clarity, and a H color.
Diamond
$304,000Sale Price|20% Off
GIA Certified 6.02 Carat F/VS2 Rectangular Modified Brilliant Diamond Ring
Located in Chicago, IL
GIA Certified 6.02 Carat F/VS2 Rectangular Modified Brilliant Diamond Ring This breathtaking 6.02-carat F-color, VS2-clarity diamond, GIA certified, features a refined cut-cornered ...
Diamond, White Diamond, Platinum
$14,400Sale Price|20% Off
2 Carat Princess Cut Rectangular Brilliant Diamond Engagement Ring
By Antinori Fine Jewels
Located in Chicago, IL
Elegant 1.99 ct "Prince Cut" Rectangular Brilliant Diamond Engagement Ring in Platinum Crafted in luxurious platinum, this stunning engagement ring showcases a dazzling 1.51 ct Natu...
Diamond, White Diamond, Emerald, Platinum
Bespoke GIA Square Pear 19.38 Carat Yellow White Platinum Diamond Drop Earrings
By Hasbani Diamonds
Located in London, GB
These Unique GIA Certified 19.38 Carat drop circle of life Earrings featuring 2 Square Cut - Cornered Rectangular Modified Brilliant GIA Certified Diamonds Y to Z in color with VS1 t...
Diamond, White Diamond, Yellow Diamond, Platinum
$3,252Sale Price|20% Off
GIA Certified 1.01 Carat Rectangular Brilliant Fancy Yellow I1 Natural Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC55507 Stone Shape: CUT-CORENRED RECTANGULAR MODIFIED BRILLIANT Diamond Weight: 1.01ct Clarity: I1 Color: Fancy Yellow Cut: Excellent Measurements: 5.67 x ...
Diamond, Yellow Diamond
Vintage GIA 1.72 carat rectangular cut diamond 14k white gold ring
Located in Beverly Hills, CA
A striking vintage ring centered around a GIA-certified 1.72 carat rectangular modified brilliant cut diamond, offering an elegant balance of elongated shape and lively brilliance.
Diamond, Gold, 14k Gold, White Gold
$1,648Sale Price|20% Off
1.28 Carat Rectangular Brilliant GIA Certified Fancy Yellow VS2 Clarity Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC55743 Stone Shape: CUT-CORENRED RECTANGULAR MODIFIED BRILLIANT Diamond Weight: 1.28ct Clarity: VS2 Color: Fancy Yellow Cut: Excellent Measurements: 6.26 x ...
Diamond
$1,464Sale Price|20% Off
Gia Certified 1.55 Carat Fancy Dark Yellowish Brown Vs2 Rectangular Diamond
Located in New York, NY
ITEM DESCRIPTION ID #: NYC53944 Stone Shape: CUT CORNERED RECTANGULAR MODIFIED BRILLIANT Diamond Weight: 1.55 CT Clarity: VS2 Color: FANCY DARK YELLOWISH BROWN Cut: Excellent M...
Brown Diamond
Issac Nussbaum 1.01 Carat Rectangular Cut Diamond Rose Gold Pendant Necklace
By Issac Nussbaum
Located in New York, NY
This stunning pendant necklace set in Italian hand made rose gold setting featuring a charming rectangular modified brilliant cut diamond, weighing 1.01 carats.
Diamond, Rose Gold
$2,124Sale Price|20% Off
1.10 Carat Rectangular Brilliant GIA Certified Fancy Brownish Yellow Vs2 Clarity
Located in New York, NY
ITEM DESCRIPTION ID #: NYC55734 Stone Shape: CUT-CORENRED RECTANGULAR MODIFIED BRILLIANT Diamond Weight: 1.10ct Clarity: VS2 Color: Fancy Brownish Yellow Cut: Excellent Measurement...
Diamond
GIA Certified .70CT Fancy Intense Yellow-VS1 5 Stone Band
By The Diamond Source
Located in San Diego, CA
This is a classic 5 stone band set with a 3/4 Carat center Cut Cornered Rectangular Modified Brilliant Diamond graded by GIA as being Fancy Intense Yellow in color and a VS1 in clari...
Yellow Diamond, 18k Gold, Platinum
Platinum 2.69 Ct. Diamond Ring
Located in Aventura, FL
This stunning contemporary ring showcases exceptional diamond craftsmanship, crafted in lustrous platinum and featuring a magnificent 1.38-carat rectangular modified brilliant diamon...
Diamond, White Diamond, Platinum
$78,400Sale Price / set|20% Off
GIA Certified 5 Carat Fancy Yellow Diamond Ring with Half-Moon Diamonds
By Antinori Fine Jewels
Located in Chicago, IL
This exceptional ring features a GIA-certified 5 carat fancy yellow diamond, presented in a refined cut-cornered rectangular modified brilliant cut.
Yellow Diamond, Gold, Platinum
$88,000Sale Price|20% Off
GIA Certified 5 Carat Fancy Yellow Diamond Three-Stone Ring
By Antinori Fine Jewels
Located in Chicago, IL
An elegant three-stone diamond ring featuring a natural 5 carat cut-cornered rectangular modified brilliant diamond, certified by GIA as Fancy Yellow color with even color distributi...
Yellow Diamond, White Diamond, Diamond, Yellow Gold, White Gold, 18k Gold
GIA Certified 12.31 Carat Fancy Yellow Internally Flawless Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
You are viewing an exceptional GIA Certified 12.31 carat Fancy Yellow diamond ring, centered by a natural cut-cornered rectangular modified brilliant-cut diamond of outstanding quali...
Diamond, White Diamond, 18k Gold, Yellow Gold, Platinum
GIA Certified 10.31 Carat Fancy Intense Yellow GIA-Certified Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
A masterpiece of nature and craftsmanship, this breathtaking ring centerpieces a spectacular GIA-certified 10.31 carat Cut-Cornered Rectangular Modified Brilliant cut diamond. Graded...
Yellow Diamond, Diamond, Platinum, 18k Gold
GIA Certified 15 Carat Fancy Intense Yellow Radiant Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
An exceptional GIA certified fancy intense yellow diamond ring, centered with a spectacular 15.87 carat cut-cornered rectangular modified brilliant diamond.
White Diamond, Diamond, Platinum, Yellow Gold, 18k Gold
$520,000Sale Price|20% Off
GIA Certified 15.03 Carat Fancy Intense Yellow Diamond Platinum Ring
By Antinori Fine Jewels
Located in Chicago, IL
An extraordinary statement of rarity and power, this GIA Certified 15.03 carat Fancy Intense Yellow diamond is a true collector’s stone. Cut as a Cut-Cornered Rectangular Modified B...
Diamond, White Diamond, Yellow Diamond, 18k Gold, White Gold, Yellow Gold
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
$78,400Sale Price|20% Off
6.03 Carat Total Weight Fancy Yellow Diamond Stud Earrings, GIA Certified
Located in Chicago, IL
A remarkable pair of natural Fancy Yellow diamond stud earrings featuring two exceptionally matched Cut-Cornered Rectangular Modified Brilliant diamonds totaling 6.03 carats.
Diamond, Yellow Diamond, Emerald, 18k Gold, Yellow Gold
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!
Diamond
Peter Suchy GIA Certified 1.42 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Designed and crafted in the Peter Suchy Workshop. 1 cut corner natural fancy deep brownish yellow rectangular modified diamond, approx. 1.42cts GIA Certificate # 5234097993 2 straig...
Diamond, Yellow Diamond, Brown Diamond, Platinum
GIA Certified 12 Carat Fancy Yellow Radiant Cut Diamond Three-Stone Ring
By Antinori Fine Jewels
Located in Chicago, IL
This stunning three-stone ring, featured on 1stdibs, features an exceptional 12.87-carat round-cornered rectangular modified brilliant-cut yellow diamond as its central focus.
Diamond, 18k Gold, Platinum
NALLY GIA Natural Fancy Green-Yellow Diamond Ring
Located in New York, NY
NALLY Exquisite Diamond Ring, with 3.60 carat Cut-Cornered Rectangular Modified Brilliant Cut center diamond Color: Natural Fancy Green-Yellow, Clarity: VS1.
Yellow Diamond, 18k Gold
Ametrine and Diamond Double Halo Ring in 14KT Yellow Gold
Located in New York, NY
Metal: 14KT Yellow Gold Gemstones: Ametrine, Diamond Ametrine Weight: 16.85CT Diamond Weight: 0.64CT Total Weight Cut: Modified Rectangular (Ametrine), Round Brilliant (Diamond) Styl...
Diamond, 14k Gold, Yellow Gold
GIA Certified 1.02 Carat Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
This stunning platinum engagement ring centers a GIA-certified 1.02-carat cushion/rectangular modified brilliant diamond, set in classic prongs.
Diamond, Platinum
GIA Certified 4 Carat D Color Diamond Yellow Gold Bezel Set Ring
By Antinori Fine Jewels
Located in Chicago, IL
An elegant and distinctive diamond ring featuring a GIA certified 4.01 carat cut-cornered rectangular modified brilliant cut diamond, graded D color and VS2 clarity.
Diamond, Yellow Gold
$96,000Sale Price|20% Off
GIA Certified 3.03 Carat E Color Internally Flawless Emerald Cut Diamond Ring
By Antinori Fine Jewels
Located in Chicago, IL
GIA Certified 3.03 Carat E Color Internally Flawless Emerald Cut Diamond Ring with Trapezoid Side Stones in Platinum An extraordinary engagement ring centered with a GIA Certified 3...
Diamond, White Diamond, Gold, 18k Gold, White Gold
Boodles, 11.30 Carats Ashoka Three Stone Diamond Engagement Ring
By Boodles
Located in Chicago, IL
Designer: Boodles Diamond cut: Ashoka ( Round-Cornered Rectangular Modified Brilliant) Center Diamond GIA Report No.: 15008446 Date: November 10th, 2025 Carat: 5.03 carats Color: I C...
Diamond, Gold, 18k Gold, Rose Gold
$480,000Sale Price|20% Off
GIA Certified 8 Carat Radiant Cut E Color Diamond Engagement Platinum Ring
By Antinori Fine Jewels
Located in Chicago, IL
This spectacular statement ring showcases a breathtaking 8.05 carat cut-cornered rectangular modified brilliant diamond—also known as a radiant cut—certified by GIA as E color and VS...
Diamond, White Diamond, Sapphire, Platinum
Belle Epoque 1.80 Ct. Diamond Plus Platinum ring
Located in Napoli, IT
Very good condition Simply divine Metal: platinum, tested Hallmarks: none/worn Gems: 1 antique modified rectangular cushion faceted cut diamond 8.13 mm. x 7.12 mm. – G/SI – 30 old b...
Diamond, Platinum
1 pc Natural Diamond - 0.50 ct - Radiant - I - VS1- GIA Certificate
Located in רמת גן, IL
Natural Cut-Cornered Rectangular modified diamond in a 0.50 carat I VS2 with Beautiful cut and shine.
Diamond
Platinum Solitaire Diamond Engagement Ring Natural Radiant 2.50ct F/VS2 GIA Sz 7
Located in Carmel By The Sea, CA
The ring contains one cut-cornered rectangular modified brilliant cut center diamond secured in a four-wire prong setting with pavé-encrusted support bars forming a concealed hidden ...
Diamond, Platinum
.76 Carat Radiant Cut Diamond Sapphire Platinum Three-Stone Engagement Ring
Located in Stamford, CT
A timeless and distinctive choice, it is perfect for those who appreciate classic design with a touch of color. 1 cut cornered rectangular modified brilliant I- VS2 diamond Approxim...
Diamond, Sapphire, Blue Sapphire, Platinum
GIA Certified 1.14 Carat Brown - Green Yellow Diamond 18 KT Gold Engagement Ring
Located in London, GB
This stunning GIA Certified 1.14 Carat Natural Fancy Dark Brown-Greenish Yellow Radiant Cut - Cornered rectangular modified Diamond situated in the center of the ring featuring 0.80 ...
Brown Diamond, Diamond, Yellow Diamond, White Diamond, Gold, 18k Gold, W...
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 cut diamond.
Diamond, White Gold, 18k Gold
2.01 ct GIA Fancy Yellowish Orange Cushion Diamond Halo Engagement Ring
By J. Birnbach
Located in New York, NY
This ring features a 2.01 carat cut-cornered rectangular modified brilliant diamond, of VS2 clarity, which has received a color grade of fancy brownish orangey yellow.
Diamond, Platinum
Peter Suchy GIA Certified 1.53 Carat Diamond Platinum Halo Engagement Ring
By Peter Suchy
Located in Stamford, CT
Created in the Peter Suchy Workshop. 1 rectangular modified brilliant cut diamond F-G VS2, approx. 1.53ct GIA certificate # 2205927529 40 round brilliant cut diamonds F-G VS, appr...
Diamond, Platinum
Peter Suchy GIA Certified 1.51 Carat Diamond Rose Gold Engagement Ring
By Peter Suchy
Located in Stamford, CT
GIA certifed cut-cornered rectangular modified brilliant cut diamond engagement ring in a 14k rose gold solitaire setting, crafted in the Peter Suchy Workshop.
Diamond, Rose Gold, Gold, 14k Gold
Radiant Cut Diamond Engagement Ring 1.70 Carat Halo Design in 14 Karat Gold
Located in San Diego, CA
RADIANT CUT DIAMOND ENGAGEMENT RING WITH HALO DESIGN Serial Number: EGL US913374023D Metal: 14KT White Gold Size: 5.75 - Sizable Total Carat Weight: 1.70 TCW Diamond Shape: Radi...
Diamond, 14k Gold, White Gold
14K White Gold Natural Radiant Cut Diamond Ring 1.01ct F/SI1 GIA Twist Pave
Located in Carmel By The Sea, CA
14K White Gold Radiant Cut Diamond Ring 1.01ct F/SI1 GIA, Twist Pave Shank, Size 7 Description: Crafted in 14-karat white gold, this engagement ring contains one cut-cornered rectan...
Diamond, 14k Gold, White Gold
Rectangular Brilliant-Cut Diamond Ring
Located in London, GB
A rectangular brilliant-cut diamond ring, the cut cornered rectangular modified brilliant-cut diamond, accompanied by GIA report stating to be of E colour and SI1 clarity, four doubl...
Platinum
Art Deco Carved Jade Ruby Diamond Gold Plaque Bracelet
Located in London, GB
An Art Deco jade plaque bracelet, the bracelet comprising six rectangular plaques of ornately-carved jade or a floral design, alternately-set with modified rectangular ruby and diamo...
Diamond, Jade, Ruby, Yellow Gold
Unavailable|$3,200
GIA Certified 1.03 Carat Rectangular Modified Brilliant Diamond
Located in Hopewell Junction, NY
GIA Report Number: 6177270171 Shape and Cutting Style: Rectangular Modified Brilliant (Princess) Measurements: 5.42 x 5.10 x 4.07 mm Carat Weight: 1.03 Carat Color Grade: O-P (Ca...
Diamond, White Diamond, Yellow Diamond
GIA Reporft Certified Cut-Cornered Rectangular Modified Brilliant Diamond
Located in Surfside, FL
GIA report certified cut-cornered rectangular modified brilliant diamond, 1 carat (F color, VS2 clarity) set in platinum mounting with triangle diamond on each side.
Diamond, Platinum
1.05 Ct Loose H/VS2 Rectangular Modified Brilliant Princess Diamond Gia Cert
Located in Sherman Oaks, CA
1.05 Ct Loose H/VS2 Rectangular Modified Brilliant Princess Diamond GIA Cert Diamond General Info GIA Report Number: 2185448167 Diamond Cut: Rectangular Modified Brilliant Measureme...
Diamond
Unavailable|$6,430
GIA Certified Rectangular 0.74 Carat Diamond Platinum Engagement Ring
Located in Surfside, FL
GIA certified rectangular modified brilliant cut diamond: 0.74 carat, E color- SI1 clarity, set in engagement ring with matching wedding band in platinum.
Platinum
Unavailable|$19,950
Elongated Radiant Cut Diamond Platinum Ring
Located in McLean, VA
Platinum Art Deco style ring center set with one cut-cornered rectangular modified brilliant diamond weighing 1.40 ct.
Diamond, Platinum
Unavailable|$20,136
Fancy Diamond Solitaire Ring 18 Karat Gold
Located in Cremona, IT
The ring is realized in 18Kt white gold with a fancy yellow color rectangular modified brilliant diamond ct.1.50 certified IGI Antwerp and eternity shank with brilliant cut diamonds ...
Diamond, Blue Sapphire, 18k Gold
Unavailable|$14,000
Loose Diamond, 2.01ct, GIA Certified, Radiant Brilliant Cut
Located in Vienna, VA
Loose Diamond, 2.01ct, GIA Certified, Radiant Brilliant Cut Loose Radiant Brilliant Cut Diamond GIA Certified Weight: 2.01ct Clarity: SI1 Color: H Measurements: 7.35 X 6.76 X 4.61 M...
Diamond
Unavailable|$11,600
Garrard Diamond and 18 Karat Gold Bow Necklace
By Garrard & Co. Ltd.
Located in Calabasas, CA
Beautiful 18 karat gold flexible rectangular link necklace centering a stylized, undulating bow channel-set with 48 modified rectangular step-cut diamonds, 4.15 carats, color: F-G, c...
Diamond, 18k Gold
Unavailable|$83,000
GIA Yellow Diamond Eternity Band Set in 18 Karat
Located in Atlanta, GA
Yellow Diamond eternity band. All 16 diamonds are cut-cornered rectangular modified brilliant & certified natural, fancy light yellow by GIA.
Diamond, 18k Gold
Unavailable|$65,000
GIA Certified 6.37 Carat Y-Z Diamond Gold Ring
Located in Los Angeles, CA
This ring features a 6.37 carat cut-cornered rectangular modified brilliant cut diamond center, the stone is GIA certified (Report No. 5172790497) as a Y-Z in color, VS2 in clarity.
Diamond, White Gold, Platinum
Unavailable|$31,609
Platinum and Gold Engagement 2 Carat Diamond Ring F, SI1
Located in Paris, IDF
A platinum and 18Kt yellow gold ring, centered with a 2 carat cornered rectangular modified brilliant cut diamond, F color, SI 1 clarity, shouldered with yellow trapeze cut diamonds ...
Diamond, Yellow Gold, Platinum
14 Karat White Gold GIA .54 Carat Princess Cut Diamond Ring VS1/E Wedding Set
Located in Gainesville, FL
You are viewing a .54ct GIA Certified Rectangular Modified Brilliant Cut Diamond Engagement ring plus Wedding band.
Diamond, 14k Gold, White Gold
Unavailable|$201,300
GIA Certified "Radiant" Cut 5.07 Carat Platinum Ring
Located in Surfside, FL
GIA certified cut-cornered rectangular modified brilliant "RADIANT" cut diamond 5.07 carat ( I color, VS2 clarity) ring set in platinum.
Platinum
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.
Ancient Egyptians referred to the vibrant stone as the “gem of the sun.”
There are many ways to showcase a diamond, from traditional prongs to a smooth, streamlined bezel. Here’s everything you need to consider.
The vintage bombé ring is bursting with color and timeless style.
Zircon is a magnificent and underrated natural gemstone that has been worn and adored for centuries.
Givers of fine gems enjoy surprise more than receivers, and women more than men. Find out what else our survey of 3,000 Americans revealed.
If diamonds don’t seem right, what about a magnificent sapphire, ruby or emerald?
Accounting for just 1 percent of all diamonds, these marvels of nature are exceedingly rare and gorgeously complex.
Learn about these antique jewelry styles, then choose a design that speaks to you.