Edwardian 0.55 Carat Old Cut Diamond Daisy Cluster Ring, circa 1910s
Located in London, GB
An Edwardian era rendition of a classic style. This beautiful rings comprises of old cut diamonds arranged in a daisy design and grain-set in platinum over 18 carat yellow gold. The ...
Diamond, 18k Gold, Platinum
Edwardian 0.95ct Old European Cut Ring. Diamond Platinum on 18K Yellow Gold JVS1
Located in New York, NY
Other Details: Primary Stone: Diamond Center Diamond Weight: 0.65 Carats Center Diamond Cut: Old Mine Cut Center Diamond Color: L Color Center Diamond Clarity: VS2 Secondary Stones...
Diamond, Gold, Platinum, Yellow Gold, 18k Gold
$1,960Sale Price|20% Off
Vintage Solid Gold 0.72ct Old Cut H VS2 Diamond Solitaire Engagement Ring
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Diamond - Old Round Cut AKA Transitional Cut - Prong Set - H Color - VS2 Clarity - 5.57mm Total Carat Weight: 0.72 (approx.)
Diamond, Gold, White Gold, Yellow Gold
14K Rose Gold Three-Stone Ruby and Old Mine-Cut Diamond Ring, 0.50ct
Located in Coral Gables, FL
Elegant and distinctive, this 14K rose gold three-stone ring features a round-cut ruby totaling 0.50 carats, accented by 2 old mine-cut diamonds totaling an additional 0.50 carats.
Diamond, Ruby, 14k Gold, Rose Gold
René Boivin Brooch Green Emerald and Old Cut Diamonds 18k Vintage Flower Pin
By René Boivin
Located in New York, NY
Exquisite Vintage 18k Yellow Gold Flower Brooch Pin by famous René Boivin, Circa 1940's Brooch measures 1.5' inch in diameter (40mm) Marked on the back with French and René Boivin ha...
Diamond, Emerald, Yellow Gold
Vintage 14K White Gold Old European Cut Diamond Wedding Set, 1.37 CTW
Located in Palm Desert, CA
An elegant vintage wedding set crafted in 14K white gold, featuring a beautifully matched engagement ring and wedding band. Together, the rings weigh 4.6 grams and showcase the timel...
Diamond, White Gold
Antique Handcrafted Old European Cut Diamond Solitaire Necklace 14k White Gold
Located in beverly hills, CA
Beautiful rare find -An elegant bezel-set diamond solitaire necklace in 14K white gold, crafted with an intricate figure-8 cable chain. Featuring one round brilliant-cut bezel-set di...
Diamond, 14k Gold, White Gold
Retro 1940s Old European Cut Diamond & Ruby Screw Back Earrings, Non-Pierced
Located in Upland, CA
About These Earrings: These Vintage Retro Diamond and Ruby Earrings are crafted in 14K rose gold and platinum, showcasing five old European cut diamonds and one transitional, accent...
Diamond, Ruby, Rose Gold
Edwardian 18k Gold Cornflower Blue Sapphire Old Cut Diamond Three Stone Ring
Located in SYDNEY, AU
Dainty Edwardian three-stone ring in 18ct yellow gold, showcasing a light cornflower-blue sapphire flanked by two twinkling old-cut diamonds in a classic belcher setting. Item Detai...
Diamond, Blue Sapphire, 18k Gold, Yellow Gold
Antique Edwardian Era 0.65 Carat Old European Cut Diamond Pearl Bar Necklace
By Belrose Estate Jewelers
Located in Santa Barbara, CA
Centered by a sparkling and fiery near 3/4 carat old European cut round diamond flanked by a pair of lustrous cultured pearls terminating with smaller diamonds.
Diamond, Pearl, Cultured Pearl, 14k Gold, White Gold, Yellow Gold, Platinum
18K White Gold & Three Stone Old European Cut 0.82± Ct Diamond Ring
Located in Philadelphia, PA
A fine antique 3-stone diamond ring. In 18 karat white gold. With a central bezel-set Old European cut 0.38± Ct diamond (Color: J-K, Clarity: I1) flanked by 2 Old European cut diam...
Diamond, 18k Gold, White Gold
$1,358Sale Price|20% Off
Antique Edwardian 18K Yellow Gold & Platinum Old Cut Diamond Lozenge Shape Ring
Located in Montclair, NJ
--Stone(s):-- (13) Natural Genuine Diamonds - Old Single & Old Round Cut - Pave Set Material: 18k Solid Yellow Gold w/ Platinum Top Weight: 2.4 Grams Ring Size: 4.5 (Fitted on a fi...
Diamond, Yellow Gold, Platinum
14K White Gold 3 Old European Cut Natural Diamond Ring Arthritic Shank Estate
Located in Carmel By The Sea, CA
This item is offered on consignment on behalf of a client; all serious and reasonable offers are presented for consideration, and I work diligently to achieve a mutually agreeable ou...
Diamond, 14k Gold, White Gold
Antique Edwardian Platinum and Old-Cut Diamond Bow Brooch, Early 20th Century
Located in Rotterdam, NL
A refined and elegant antique bow brooch, crafted in platinum and set with a beautiful array of old-cut diamonds. The design captures the lightness and sophistication of the Edwardia...
Diamond, Platinum
Cartier Engagement Ring. GIA 1.10ct Round Cut Diamond Accent Ring Platinum
Located in New York, NY
Other Details: Primary Stone: Diamond Center Diamond Weight: 1.10 carats Center Diamond Cut: Round Brilliant Cut Center Diamond Color: F Center Diamond Clarity: VS1 Center Diamond S...
Diamond, Platinum
Mid-Century 1.00 Ctw. Old European Cut Diamond Cluster Toi et Moi Ring
Located in Los Angeles, CA
Metal: 18k Yellow Gold & 18k White Gold Stones: 1.00 Ctw. Old European Cut Diamonds; 2.00 Ctw. Round Brilliant Cut Diamonds Current Size: Fits like a size 6.25 approximately (sizabl...
Diamond, 18k Gold, White Gold, Yellow Gold
Antique Victorian Blue Sapphire & Old Cut Diamond Curb Bracelet 15ct Rose Gold
Located in SYDNEY, AU
This spectacular antique late-Victorian curb-link bracelet showcases six vivid cornflower-blue natural sapphires in bezel settings, interspersed with six sparkling old-cut diamonds i...
Diamond, Blue Sapphire, 15k Gold, Rose Gold, Gold
Antique Art Deco 1920s Tiffany & Co. 1.00 Carat Old European Cut Diamond Ring
By Tiffany & Co.
Located in New York, NY
Finely crafted in platinum with a Old European cut Diamond center stone weighing approximately 1.00 carat and Round Brilliant cut Diamonds surrounding it weighing approximately a tot...
Diamond, Platinum
An Edwardian 15K Gold & 0.15ct Old-European Cut Diamond Maltese Cross Stick Pin
Located in MELBOURNE, AU
This Antique Stick Pin is Edwardian, dating back to beginning of XXc Crafted in 15K Yellow Gold it's finely detailed throughout, designed as Maltese cross featuring an Old-Eur...
Diamond, 15k Gold
$1,358Sale Price|20% Off
Vintage 14k White Gold .45ctw Old Cut Diamond Solitaire Engagement Promise Ring
Located in Montclair, NJ
All original vintage illusion set diamond ring. Guaranteed to please! Enjoy! --Stone(s):-- (1) Natural Genuine Diamond - Old Transitional Cut - Illusion Prong Set - G Color - SI1 Cl...
Diamond, 14k Gold, White Gold
Antique English 15k Yellow Gold Ruby Cabochon and Old Mine-Cut Diamond Ring
Located in New York, NY
A beautifully balanced example of late Victorian craftsmanship, this antique English ring is finely fashioned in rich 15-karat yellow gold and centered by a vibrant ruby cabochon of ...
Diamond, Ruby, 14k Gold, 15k Gold
Art Deco old cut diamond synthetic sapphire navette 18k white gold ring
Located in Beverly Hills, CA
A distinctive jewel from the Art Deco period, this elegant navette ring showcases three antique Peruzzi cut diamonds arranged in a graceful elongated design. Totaling approximately 0...
Diamond, Sapphire, Gold, 18k Gold, White Gold
0, 60 carat old cut Diamond, 18 Karat White Gold Ring
Located in Marcianise, CE
Elegant ring in 18 karat white gold structure studded with a diamond in the central part. The origin of this ring goes back to the 1950s.It was totally handmade by Italian master gol...
Diamond, 18k Gold, White Gold
0.45 Carat Old European Cut Diamond Halo 14K White Gold Floral Engagement Ring
Located in Miami, FL
Details: Item Type: Engagement Ring Metal: 14K White Gold (hypoallergenic, durable) Size: 7.5 (adjustable) Weight: 4.38 grams Center Stone Details: Type: Old European Cut Diamond Ca...
Diamond, Gold, 14k Gold, White Gold
Old European Cut Single Diamond Stud Earring Mined D VVS .20ct Deco 1930's
Located in Dearborn, MI
Genuine Original Antique from 1930's Art Deco Single Diamond .20ct Old European Cut Stud Earring 14K White Gold Features Genuine Natural Mined D-E VVS .20ct Old European Cut Diamo...
Diamond, 14k Gold, White Gold
$13,044Sale Price|20% Off
EGL-USA Certified 1.4 Carat Old Cut Diamond Art Deco Style Engagement Ring
By Antinori Fine Jewels
Located in Chicago, IL
This exquisite engagement ring showcases a brilliant 1.4 carat EGL-USA certified Old Transitional Cut diamond, elegantly set in a captivating Art Deco inspired design.
Diamond, 14k Gold, White Gold
$11,160Sale Price|20% Off
Antique Edwardian Platinum 1.1ctw GIA E IF Old Cut Diamond Crown Design Ring
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Diamond - Old Circular Cut - Prong Set - E Color - IF Clarity -1.02ct (exact - certified) ** See Certification Details Below for Complete Info ** (1...
Diamond, Platinum
$6,320Sale Price|20% Off
Antique Edwardian 18k & Platinum Pearl 3.6ct Old Cut Diamond Milgrain Pin Brooch
Located in Montclair, NJ
Enjoy :) --Stone(s):-- (1) Genuine Pearl (could be natural) - Round Shape - White Color w/ Fine Luster - 6.35mm (approx.) (72) Natural Genuine Diamonds - Old Single, Old European, &...
Diamond, Pearl, 18k Gold, Yellow Gold, Platinum
Mark Broumand 4.56 Carat Fancy Orangy Brown Old Mine Cut Diamond Ring
By Mark Broumand
Located in Los Angeles, CA
This gorgeous diamond engagement ring showcases a stunning 4.01ct old Mine cut center diamond, GIA certified at Fancy Orangy Brown-SI2.
Diamond, 18k Gold, Rose Gold
Antique Art Deco 18K White Gold Red Spinel & Old Euro Cut Diamond Ring
Located in New York, NY
A striking example of Art Deco design, this antique ring is crafted in 18K white gold and showcases a vibrant interplay of rich red spinels and glittering old European cut diamonds. ...
Diamond, Spinel, 18k Gold, White Gold
Old cut diamonds and green emerald antique engagement ring in 9ct yellow gold.
Located in London, GB
Old cut diamonds and green emerald antique engagement ring in 9ct yellow gold. Hallmarked The ring can be resized Diamond total weight 0.25ct G colour VS2 clarity Emerald green colou...
Diamond, Emerald, Yellow Gold
Antique Art Deco Platinum Natural Old Cut Sapphire Diamond Engagement Ring - GIA
Located in Great Neck, NY
Beautiful Antique Art Deco Platinum Natural Old Cut Sapphire Diamond Engagement Ring - GIA. This gorgeous engagement ring is crafted in platinum. The center holds a beautiful natural...
Diamond, Blue Sapphire, Platinum
$3,198Sale Price|20% Off
Antique Edwardian 18k Yellow Gold Platinum Pearl & Old Cut Diamond Saddle Ring
Located in Montclair, NJ
--Stone(s):-- (4) Genuine Cultured Pearls - Round Shape - White Color - Very Nice Luster - 4.75-5.25mm (approx.) (20) Natural Genuine Diamonds - Old European & Old Mine Cut - Pave Se...
Diamond, Pearl, Gold, 18k Gold, Yellow Gold, Platinum
Antique Emerald and Old Cut Diamond Platinum and Gold Necklace, circa 1905
Located in London, GB
Magnificent antique necklace set with a round shaped emerald weighing approximately 3.00+ carats accompanied by 54 old mine cut diamonds in rub over, open back settings weighing a to...
Diamond, Emerald, 18k Gold, Platinum, Gold
Antique Edwardian 18ct Gold Pink Ruby & Old Cut Diamond Three Stone Belcher Ring
Located in SYDNEY, AU
Dainty Edwardian three-stone ring in 18ct yellow gold, showcasing a vivid pink ruby flanked by two twinkling old-cut diamonds in a classic belcher setting. Item Details: - Stones :...
Ruby, Diamond, Gold, Yellow Gold, 18k Gold
Antique Edwardian 18k Gold Royal Blue Sapphire Old Cut Diamond Three Stone Ring
Located in SYDNEY, AU
Dainty Edwardian three-stone ring in 18ct yellow gold, showcasing a vivid royal blue sapphire flanked by two twinkling old-cut diamonds in a classic belcher setting. Item Details: ...
Diamond, Blue Sapphire, 18k Gold, Yellow Gold
GIA Certified 1.01 Carats Round Cut Diamond & Tsavorite Halo Engagement Ring
By Roman Malakov
Located in New York, NY
A beautiful art deco engagement ring, showcasing a bezel-set 1.01 carats round cut diamond certified by GIA as K color and VS1 clarity. Surrounded by a halo of tapered cut Tsavorites...
Diamond, Tsavorite, Platinum
Old Cut 1.10 cts L VS2 Halo Diamond Engagement Ring in 14k White Gold GIA
Located in San Diego, CA
Old Cut Diamond Halo Engagement Ring Style: Halo Ref. number: GIA 5231338842 Metal: 14k White Gold Size: 5.75 sizable Measurements: 1.4 mm Band Main Diamond: Old Cut Round-Corn...
Diamond, 14k Gold, White Gold
Antique Old Cut Diamond Platinum & 18 Carat White Gold Art Deco Cluster Ring
Located in London, GB
Introducing a spectacular English diamond ring from the 1920s, beautifully centred on a rounded, cushion shaped platinum plaque. The surface is defined by an intricate platinum fram...
Diamond, White Diamond, Gold, 18k Gold, White Gold, Platinum
$11,984Sale Price|20% Off
Antique Art Deco Platinum 5.05ctw GIA Pear Ruby & Old Cut Diamond Fan Earrings
Located in Montclair, NJ
--Stone(s):-- (6) Natural Genuine Ruby - Pear Cut - Prong Set - Red Color - Burma No Heat & Synthetic Mix- 1.80ctw (approx.) ** See Certification Details Below for Complete Info ...
Diamond, Ruby, Gold, Yellow Gold, Platinum
$1,451Sale Price|20% Off
Vintage Retro 14k Yellow Gold 0.25ctw Old Cut Diamond Hand Engraved Band Ring
Located in Montclair, NJ
--Stone(s):-- (6) Natural Genuine Diamonds - Old Round Cut - Prong Set - G/H Color - VS1/VS2 w/ Few SI Clarity - 0.25ctw (approx.)
Diamond, Gold, 14k Gold, Yellow Gold
22342 Victorian 18K Yellow Gold Old Miner Cut Diamond Royal Blue Sapphire Ring
Located in Chicago, IL
18K yellow gold ring weighs 4g Center old miner cut diamond ~0.50ct 12 old miner side diamonds, total weight 1.50ct Diamond I color VS2 clarity 2 royal blue sapphires, total weight ...
Blue Sapphire, Diamond, Yellow Gold, 18k Gold
French 19th Century Natural Pearl and Old-Cut Diamond Ring in 18K Gold
Located in MONTMORENCY, FR
Its combination of a natural pearl, old-cut diamonds and 18K gold offers authentic period character and timeless sophistication.
Diamond, Natural Pearl, 18k Gold, Yellow Gold
Antique Emerald and Old Mine Cut Diamond Platinum Ring Circa 1915
Located in Santa Monica, CA
These three stones are surrounded by 14 old brilliant and single cut round diamonds in a stylish platinum bypass setting
Diamond, Emerald, Platinum
Half Eternity Alternate Ruby and Diamond Band. Round Cut Wedding Ring Platinum
Located in New York, NY
Other Details: Secondary Stones: Rubies and Diamonds Diamond Weight: 0.65 Carats Total Ruby Weight: 0.90 Carats Total Diamond Color: L-M Color Diamond Clarity: VS2-SI2 Diamond Cut: ...
Diamond, Ruby, Platinum
Antique 5.77 Carat Total Old European Cut Diamond Halo 14K Gold Clip-on Earring
Located in Scottsdale, AZ
The use of round old European cut diamonds adds a vintage charm to the earrings, and the arrangement of a larger diamond at the center surrounded by slightly smaller diamonds creates...
Diamond, White Diamond, Gold, 14k Gold, Yellow Gold
Art Deco 3 Carat Old Mine Cut Double Diamond and Platinum Ring Circa 1930's
By H & H Jewels
Located in Miami, FL
" ✔ Vintage Art Deco ✔ Circa 1930's Europe Center Diamonds (2) Details: ✔ Diamond Weight: 3 carats (1.50 carats each) ✔ Diamond Color: G-H ✔ Diamond Cut: Round, Old-Mine cut ✔...
Diamond, Platinum
Antique Art Deco 14K North South Old European Cut Diamond Ring 3.80cttw Sz5
Located in Winter Springs, FL
A beautifully made hand crafted 14k Art Deco ring beautifully set with approximately 3.80cttw in larger, well matched Old European cut diamonds being G-I in color and Vs1-2 in clarit...
Diamond, 14k Gold
Antique Victorian 14K Gold and Silver Top Old Cut Diamond Engagement Ring - GIA
Located in Great Neck, NY
Beautiful Antique Victorian 14K Gold and Silver Top Old Cut Diamond Engagement Ring - GIA. This beautiful Victorian old cut diamond engagement ring is crafted in 14k yellow gold and ...
Diamond, Gold, 14k Gold, Yellow Gold, Silver
1.05 Carat Old European Cut Diamond with Ruby Statement Ring in 18 Karat Gold
By Gems Paradise
Located in Jaipur, IN
Details of the piece: Gross Weight: 7.682 grams 18 Karat Gold: 7.036 grams Old European Cut Diamond: 1.05 carat Round Diamond: 0.87 carats Ruby: 1.31 carats Ring Size: US 7 Note: T...
Diamond, Ruby, 18k Gold, White Gold
Vintage Retro 14K Yellow Gold Old Cut Diamond Flush Set Engagement Ring - GIA
Located in Great Neck, NY
Beautiful Vintage Retro 14K Yellow Gold Old Cut Diamond Flush Set Engagement Ring - GIA. This gorgeous Retro old cut diamond flush set engagement ring is crafted in 14k yellow gold w...
Diamond, Gold, 14k Gold, Yellow Gold, Platinum
Vintage Engagement Ring. 3ct Round Transitional Cut Diamond Ring Platinum L VS1
Located in New York, NY
Other Details: Primary Stone: Diamond Center Diamond Weight: 3.00 carats Center Diamond Cut: Transitional Cut Center Diamond Color: Approximately L Center Diamond Clarity: VS1 Cente...
Diamond, Platinum
Art Deco Platinum and 14K White Gold 0.85ctw Old Cut Diamond Trilogy Panel Ring
Located in Staines-Upon-Thames, GB
This statuesque Art Deco ring is centred upon a large, old European cut diamond. The chunky, round diamond is held within an octagonal setting, giving the diamond the appearance of b...
Diamond, 14k Gold, White Gold, Platinum
1.35 Carat Old European Cut Diamond with Cabochon Sapphire Ring in 18 Karat Gold
By Gems Paradise
Located in Jaipur, IN
Details of the piece: Gross Weight: 7.996 grams 18 Karat Gold: 6.856 grams Old European Cut Diamond: 1.35 carat Round Diamond: 0.31 carats Sapphire: 4.04 carats Ring Size: US 7 Not...
Diamond, Sapphire, 18k Gold, White Gold, Gold
Vintage Art Deco 18K Black Opal & Onyx Old European Cut Diamond Cufflinks
Located in Winter Springs, FL
Beautiful cufflinks are a rarity, but these are truly exceptional. Backed in 18K gold, the octagonal onyx sections are inlayed with fiery pieces of natural black opal exhibiting flas...
Diamond, Onyx, Opal, Black Opal, 18k Gold, White Gold
$11,660Sale Price|20% Off
Vintage Old Mine Cut Diamond Filigree Bar Pin Brooch in Platinum & 14 Karat Gold
Located in Scottsdale, AZ
Metal: Platinum and 14 White Gold Closure: Hinged stick pin Natural Diamonds: 1.45 ctw Diamond Cut: Old Mine and Round Diamond Color: G-H Diamond Clarity: SI-SI1 Length: 2.63" Width...
Diamond, Gold, 14k Gold, White Gold, Platinum
Vintage 1 Carat Engagement Ring. Old Euro Cut Diamond Ring 14k White Gold L VS2
Located in New York, NY
Other Details: Primary Stone: Diamond Center Diamond Weight: 1.00 Carats Center Diamond Cut: Old European Cut Center Diamond Color: L Center Diamond Clarity: VS2 Jewelry Type: Ring...
Diamond, Gold, White Gold, 14k Gold
Antique Art Nouveau 15K Yellow Gold Old Cut Diamond and Pearl Enamel Stick Pin
Located in Great Neck, NY
Beautiful Antique Art Nouveau 15K Yellow Gold Old Cut Diamond and Pearl Enamel Stick Pin. This gorgeous Art Nouveau old cut diamond and pearl stick pin is crafted in 15k yellow gold....
Diamond, Pearl, Gold, 15k Gold, Yellow Gold, Enamel
Art Deco 2.35 CT Natural Diamond Old European Cut Engagement Ring 18K White Gold
Located in Los Angeles, CA
Art Deco 2.35 Carat Old European Cut Diamond Engagement Ring in 18K White Gold. This ring features a natural 2.35 carat Old European cut diamond set in an elegant Art Deco style sett...
Diamond, White Gold
Antique Victorian 18k Gold, Black Enamel & Old Cut Diamond Mourning Ring, C 1884
Located in MELBOURNE, AU
Although Mourning Jewelry has a long & fascinating history, going back to as far as Middle Ages, its popularity reached its peak during the reign of Queen Victoria (1837 - 1901...
Diamond, 18k Gold, Enamel
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.