Spectra Fine Jewelry 11.68 Carat Zambian Emerald Diamond Ring
By Spectra Fine Jewelry
Located in New York, NY
The emerald's vivid green hue, confirmed by a C. Dunaigre and Gubelin report, is a testament to its rarity and exclusivity.
Diamond, Emerald, 18k Gold, Platinum
18K White Gold Ring with Natural Siam Ruby and Diamonds
Located in Bergamo, BG
The centerpiece is beautifully surrounded by a halo of brilliant-cut diamonds, amplifying the ruby’s natural allure and elegance. Accompanied by a C. Dunaigre certificate, this exqui...
Diamond, White Diamond, Ruby, 18k Gold, White Gold
23.92 Carat Colombian Emerald & Diamond Dangle Earrings
By Vivid Diamonds
Located in Miami, FL
All the emeralds are certified by C. Dunaigre Switzerland Colombian provenance, Imperial Green with insignificant to minor treatment.
Diamond, Emerald, Platinum
Shreve, Crump & Low 16.95 Carat Pink Sapphire Sapphire and Diamond Platinum Ring
By Shreve, Crump & Low
Located in Boston, MA
This pink is of Madagascar origin, accompanied by a C. Dunaigre laboratory report no. CDC 1401279.
Diamond, Pink Sapphire, Platinum, 18k Gold, Yellow Gold
Emilio Jewelry Certified 17.03 Carat Emerald Diamond Ring
By Emilio!
Located in New York, NY
Showcasing an emerald cut 16.14ct Genuine Emerald certified by C.Dunaigre as intense Green color. Based on emerald grading methodology the clarity of the emerald is Internally flawle...
Diamond, White Diamond, Emerald, 18k Gold, Platinum
Emilio Jewelry 5.46 Carat Certified Colombian Emerald Diamond Ring
By Emilio!
Located in New York, NY
Showcasing a round cut 4.21ct Genuine Emerald certified by C.Dunaigre as Colombian. Based on emerald grading methodology the clarity of the emerald is Internally flawless-vvs1 with n...
Diamond, White Diamond, Emerald, 18k Gold, Platinum
$144,000Sale Price|20% Off
11.82 Carat Colombian Vivid Green Cushion Emerald and Diamond Platinum Ring
By Antinori Fine Jewels
Located in Chicago, IL
The emerald is accompanied by a C. Dunaigre gemstone report, which identifies the stone as a natural beryl emerald of Colombian origin.
Diamond, White Diamond, Emerald, 18k Gold, Platinum
$96,000Sale Price|20% Off
Platinum Emerald Cut Diamond and Unheated Vivid Blue Sapphire Earrings
By Antinori Fine Jewels
Located in Chicago, IL
One of the sapphires is accompanied by a C. Dunaigre Switzerland Gemstone Report, identifying it as a natural sapphire weighing 3.33 carats, with dimensions of 9.75 x 6.85 x 4.63 mm ...
Diamond, Blue Sapphire, White Gold, Platinum
$68,000Sale Price|20% Off
5.34 Carat Vivid Green Colombian Emerald Diamond Three-Stone Ring
By Antinori Fine Jewels
Located in Chicago, IL
The emerald is accompanied by C. Dunaigre Switzerland Gemstone Report No. CDC 2105373, dated May 18, 2021.
Diamond, Emerald, Platinum
$60,000Sale Price|20% Off
4.70 Carat Colombian Emerald Diamond Platinum Cocktail Ring
By Antinori Fine Jewels
Located in Chicago, IL
The emerald is accompanied by a C. Dunaigre Switzerland Gemstone Report No. CDC 1601125, dated January 26, 2016.
Diamond, White Diamond, Emerald, Platinum
$176,000Sale Price|20% Off
3.18 Carat No Heat Mozambique Ruby Diamond Ring, Vivid Red “Pigeon Blood”
Located in Chicago, IL
A striking and highly collectible ruby ring centered around a 3.18 carat natural ruby, certified by C. Dunaigre Switzerland, displaying a richly saturated vivid red color, a color gr...
Diamond, Ruby, Platinum
$70,800Sale Price|20% Off
Certified 4.22 Carat Natural Alexandrite Heart-Shaped Diamond Necklace
By Antinori Fine Jewels
Located in Chicago, IL
The gemstone is accompanied by an independent gemstone report issued by C. Dunaigre Consulting, Switzerland, identifying it as natural chrysoberyl (alexandrite) of Tanzanian origin.
Alexandrite, Diamond, White Diamond
Emilio Jewelry Certified Padparascha Sapphire Ring
By Emilio!
Located in New York, NY
Main stone: 7.80 + carats Pinkish-Orange OVAL (H) Matching: 161 white diamonds totaling about 6.32 carats Certificate: GRS & C.Dunaigre In addition to the red and sapphire in the c...
Sapphire, Padparadscha Sapphire
Emilio Jewelry 14.62 Carat Certified Vivid Green Emerald Diamond Earrings
By Emilio!
Located in New York, NY
2 Genuine Emeralds certified by C.Dunaigre as Zambian origin. The color has been certified as Vivid green, the most desirable color in emeralds.
Diamond, White Diamond, Emerald, 18k Gold, Platinum
$76,000Sale Price|20% Off
7.16 Carat Certified Zambian Emerald Diamond Platinum Drop Earrings
By Antinori Fine Jewels
Located in Chicago, IL
The emeralds weigh 3.84 carats and 3.32 carats and are accompanied by individual C. Dunaigre Switzerland gemstone reports confirming their natural Zambian origin.
Diamond, Emerald, White Gold, Platinum
$56,000Sale Price|20% Off
Certified 4.83 Carat Unheated Ceylon and Madagascar Sapphire Diamond Earrings
By Antinori Fine Jewels
Located in Chicago, IL
The two natural sapphires weigh 2.57 carats and 2.26 carats, respectively, and have been independently examined by C. Dunaigre Consulting GmbH, Switzerland. The accompanying gemstone...
Diamond, Emerald, Blue Sapphire, Sapphire, White Gold, Platinum
$64,000Sale Price|20% Off
6.10 Carat Vivid Green Colombian Pear Shape Emerald Diamond Three Stone Ring
By Antinori Fine Jewels
Located in Chicago, IL
The emerald is accompanied by a C. Dunaigre Switzerland Gemstone Report No. CDC 2605926, dated May 20, 2026.
Diamond, Emerald
Oscar Heyman 8.33 Carat Ceylon Star Sapphire Ring
By Oscar Heyman
Located in New Orleans, LA
The exceptionally rare royal blue star sapphire is certified by C. Dunaigre as completely free of heat treatment and of prestigious Ceylon (Sri Lanka) origin.
White Diamond, Star Sapphire, Platinum
Certified 3 Carat No Heat Padparadscha Sapphire Diamond Engagement Ring
Located in Santa Barbara, CA
Condition: New Era: Art Deco Metal: Platinum Gemstone: No Heat Padparadscha Sapphire Carat Weight: 3.12 Cut: Oval Color: Orangy Pink Clarity: Transparent Accent Diamonds: 32 French...
Diamond, Sapphire, Padparadscha Sapphire , Pink Sapphire, Platinum
Emilio Jewelry 3.50 Carat Certified Vivid Red Pigeons Blood Ruby Ring
By Emilio!
Located in New York, NY
From The Vault At Emilio Jewelry New York, A gorgeous breathtaking elongated ruby certified by C.Dunaigre as Vivid Red pigeons blood weighing over 3 carats.
Ruby
Spectra Fine Jewelry, Certified 19.22 Carat Colombian Emerald Diamond Ring
By Spectra Fine Jewelry
Located in New York, NY
The impressive stone is accompanied by reports from C. Dunaigre and Gemresearch Swisslab (GRS) stating that it is a natural beryl type emerald of green color, Colombian origin with m...
Diamond, Emerald, 18k Gold
52.00 ctw Diamond & Colombian Emerald Palladium Rivière Bracelet
Located in Tysons, VA
Accompanied by a report from C. Dunaigre stating Colombian origin with no indications to insignificant clarity enhancement, this jewel unites rarity of material with disciplined craf...
Diamond, Emerald, Palladium
$38,400Sale Price|20% Off
CDC Certified 4.85 Carat Colombian Vivid Green Emerald Ring
Located in Chicago, IL
An exceptional Colombian emerald ring centered on a 4.85 carat natural emerald of remarkable presence and saturation, accompanied by a C. Dunaigre Switzerland (CDC) Gemstone Report.
Diamond, Emerald
Spectra Fine Jewelry, Certified Colombian Emerald Drop Earrings
By Spectra Fine Jewelry
Located in New York, NY
The two smaller emeralds on top weigh 5.56 and 4.79 carats, while the two larger emeralds on the bottom weigh 15.81 and 18.14 carats, for a total emerald weight of 44.32 carats. Cer...
Emerald, 18k Gold
$74,480Sale Price|24% Off
6.56 Carat Colombian Emerald Diamond Three-Stone Ring with Swiss Certification
Located in Chicago, IL
An elegant and impactful three-stone ring centered by a natural Colombian emerald weighing 6.56 carats, accompanied by a Swiss gemological report from C. Dunaigre. The emerald is fa...
Diamond, White Diamond, Emerald, Platinum
$78,400Sale Price|20% Off
11.06 Carat Colombian Heart Shape Emerald Diamond Pendant Necklace
Located in Chicago, IL
An exceptional and highly expressive pendant necklace centered by a natural Colombian emerald weighing an impressive 11.06 carats, accompanied by a Swiss gemological report from C. D...
Diamond, White Diamond, Emerald, Platinum
$27,290Sale Price|25% Off
Certified 5.40 Carat Natural Intense Blue Sapphire & Diamond Halo Ring
Located in Bangkok, Bangkok
Metal: 18K White Gold Center-Stone: Sapphire - 5.40 Carats Shape: Oval Treatment: None Origin: Siam (Thailand) Color: Intense Blue Certification: C. Dunaigre Diamond: Round Diamonds ...
Diamond, Blue Sapphire, 18k Gold
Emilio Jewelry Certified 11.99 Carat Pear Shape Emerald Diamond Ring
By Emilio!
Located in New York, NY
Ring dimensions: 25 long x 18mm wide Includes Gemstone Report by C.Dunaigre, Switzerland *Complimentary resizing service Estimated AGI Appraisal Retail Value: $215,000 Our brand is...
Diamond, White Diamond, Emerald, 18k Gold, Platinum
Emilio Jewelry 3.72 Carat Certified Vivid Green Emerald Diamond Ring
By Emilio!
Located in New York, NY
Showcasing a gorgeous Emerald cut 3.16ct Genuine Emerald Certified by C.Dunaigre. The emerald color is certified as Vivid green, the most desirable color in emeralds.
Diamond, White Diamond, Emerald, 18k Gold, Platinum
Certified 2.05 Carat Colombian Emerald in Platinum 3-Stone Engagement Ring
By Eytan Brandes
Located in Sherman Oaks, CA
A gemstone report from C. Dunaigre (a Swiss firm frequently used in the trade for colored stones) is included with the ring and certifies the stone is Colombian in origin and has bee...
Diamond, White Diamond, Emerald, Platinum
Emilio Jewelry Asscher Cut 3.57 Carat Cornflower Blue Sapphire Ring
By Emilio!
Located in New York, NY
The stone is loop-clean, with excellent clarity visible even under magnification—an uncommon trait for sapphires of this size and color intensity. Accompanied by a C. Dunaigre (Swit...
Gubelin Cert 6.81 Carat Emerald Diamond Platinum Ring
Located in Sarasota, FL
Emerald is Gubelin and C. Dunaigre Certified. We Offer Complementary Sizing with every Purchase.
Diamond, Emerald, Platinum
Emilio Jewelry 12.27 Carat Certified Genuine Emerald Diamond Ring
By Emilio!
Located in New York, NY
Includes Gemstone Report by C.Dunaigre, Switzerland. Ring US size 7 *Complimentary resizing service For your piece of mind we are a proud Top Selling dealer on 1stdibs, and you will...
Diamond, White Diamond, Emerald, 18k Gold, 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.”
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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.