Platinum Ring with Cushion Cut Sapphire and Round Diamonds
By Diana M. Jewels
Located in New York, NY
Platinum sapphire and diamond ring with 6.12 carats cushion cut sapphire c.Dunaigre certified set with 3.22 carats of round diamonds around on the sapphire princess diana style.
Diamond, Sapphire, Platinum
Diana M. 20.37 Carat Oval Cut Emerald and Diamond Bracelet
By Diana M. Jewels
Located in New York, NY
18 kt white gold emerald and diamond bracelet adorned with 20.37 cts tw of oval cut emeralds surrounded and separated by 4.22 cts tw of C.Dunaigre certified diamonds
Diamond, Emerald, 18k Gold
CD Unheated Burma Ruby and White Diamond Cocktail Ring in Platinum and 18k
Located in Los Angeles, CA
Ring size 6+. Comes with C. Dunaigre certificate.
White Diamond, Ruby, Platinum
Diana M. 36.50 Carat Diamond Bracelet with Emeralds
By Diana M. Jewels
Located in New York, NY
Open work 18 kt white gold diamond soft fashion bracelet adorned with 36.50 cts tw of diamonds and with 48.73 cts tw of green emeralds laid throughout (C.Dunaigre Certified)
Diamond, Emerald, 18k Gold
Magnificent 4.8ctw Mozambique Ruby Ring
By Unbranded
Located in Tysons, VA
This elegant ring centers a 4.81-carat natural ruby from Mozambique, pear-shaped and faceted, certified untreated and unheated by C. Dunaigre. The vivid red gemstone is accented by d...
Ruby, Diamond, 18k Gold, Yellow Gold
Diana M. Certified 8.16 Carat Heart Shaped Emerald Earrings
By Diana M. Jewels
Located in New York, NY
18kt white gold heart shape earrings weighing 8.16 cts; heart and round shape diamond in a halo weighing total of 8.00 ct of white diamonds set all the way around. C. Dunaigre
Diamond, Emerald, 18k Gold, White Gold
Natural Beryl Zambian Pear Shape Emerald Ring
Located in Dallas, TX
Ring Size: 6 18K yellow gold 11.24CT Natural Beryl Zambian Pear Shape Emerald 8.29ctw I-J/VS Pear Shape, Marquis Cut, and Round Brilliant Diamonds Includes de Boulle box, C. DUNAIGRE...
Diamond, Emerald, Yellow Gold
Diana M. Platinum ring featuring an 8.51 ct Ceylon sapphire with 2 trillants
By Diana M. Jewels
Located in New York, NY
Platinum custom sapphire and diamond ring featuring an 8.51 ct oval certified Sri Lanka natural Ceylon blue sapphire with 2 triangle cut diamonds F color VS clarity, sides totaling ...
Sapphire, Platinum
$60,108Sale Price|20% Off
Dunaigre Certified 11.06ct Heart-Shaped Emerald Pear Diamond Platinum Ring
By Antinori Fine Jewels
Located in Chicago, IL
Cut in a heart shape with a modified brilliant faceting, the emerald measures approximately 14.01 × 16.11 × 8.75 mm. According to the C. Dunaigre Gemstone Report (no. CDC 2404150, da...
Diamond, Emerald, Platinum
$8,240Sale Price|20% Off
6.08 Carat Oval Emerald Cabochon Engagement Ring in 18K Gold, Certified.
By MOGULDIAM INC
Located in New York, NY
Elegant and classy oval cabochon emerald ring handcrafted in 18 k yellow gold and certified by C.Dunaigre, Switzerland. The details are as follows : Emerald weight : 6.08 carat Di...
Emerald, Yellow Gold
Certified 4.13 Carat Natural Ceylon Blue Sapphire & Diamond Three Stone Ring
Located in Baltimore, MD
Certified 4.13 Carat Natural Ceylon Blue Sapphire & Diamond Three Stone Ring Sapphire: Certified C. Dunaigre 4.13 carat natural Ceylon blue oval sapphire Diamonds: 2 natural oval dia...
Diamond, Blue Sapphire, White Gold
$80,000Sale Price|20% Off
Dunaigre Certified 4 Carat Vivid Red Ruby Platinum Three-Stone Ring
By Antinori Fine Jewels
Located in Chicago, IL
A striking and timeless creation, this exceptional three-stone ring features a vivid red 4.11 carat oval/mixed cut ruby, certified by C. Dunaigre (CDC) as a natural ruby of Mozambiqu...
Diamond, White Diamond, Ruby, Platinum
11.33 Carat Colombian Emerald Detachable Drop Earrings with Diamonds
Located in New York, NY
Finely crafted in 18k white and yellow gold with 2 C. Dunaigre certified Colombian Emeralds, one weighing 5.86 carats and the other 5.47 carats.
Diamond, Emerald, 18k Gold
16.56 ctw Mid-Century Cushion Padparadscha Sapphire & Diamond Platinum Ring
Located in Tysons, VA
Centering a 15.26 carat natural no-heat Padparadscha sapphire, this remarkable cocktail ring features a square cushion mixed-cut gemstone displaying the delicate blend of pink and or...
Diamond, Sapphire, Pink Sapphire, Padparadscha Sapphire , Platinum
Antique Silver Topped 14k Yellow Gold Colombian Emerald & Diamond Necklace
Located in New York, NY
Weight: 76.5 Grams Stone: Colombian Emerald 3.50ct, C. Dunaigre certified, minor oil Stone: Old Mine Cut Diamond 27.8ctw, H-M color, VS1-SI1 clarity Length: 20" Hallmark: C.
Diamond, Emerald, 14k Gold, Yellow Gold, Silver
5 Carat Pink Sapphire and Diamond Ring
By Diamond Scene New York
Located in New York, NY
Certified Vivid Pink Cushion Cut 5.06 carat sapphire and diamond ring. .75 carats of colorless white half moon cut diamonds set in 18k white gold. Certified by C. Dunaigre Consu...
Diamond, Pink Sapphire
Burmese Ruby and Diamond Floral Cluster Statement Bracelet
Located in Chicago, IL
The deep, saturated crimson of the heated Burmese rubies is authenticated by a prestigious C. Dunaigre (CDC) certificate, guaranteeing the gemstones' geographical origin and exceptio...
Diamond, Ruby, 14k Gold
6 carat Natural No Heat Blue Sapphire and Diamond Ring
By Diamond Scene New York
Located in New York, NY
Can be sized to any finger size. Certified by C. Dunaigre of Switzerland.
Diamond, Sapphire, Blue Sapphire, Platinum
$42,400Sale Price|20% Off
Alexander Beverly Hills GIA 11.24ct Emerald & Diamond Three Stone Ring 18k
By Alexander Beverly Hills
Located in BEVERLY HILLS, CA
Stunning natural emerald of superb color and natural diamond three stone ring with halo. GIA & C. Dunaigre certified emerald and both trapezoid diamonds GIA certified, a total of 4 c...
Diamond, White Diamond, Emerald, Gold, 18k Gold, White Gold
Platinum Art Deco Certified 1.50 Carat No Heat Ruby Diamond Ring
Located in New York, NY
Platinum cocktail ring, set with center C. Dunaigre of Switzerland certified 1.50ct no heat Thailand ruby.
Diamond, Ruby, Platinum
Significant 11.42 ct Certified Ceylon Sapphire and brilliant cut diamond ring
By Ri Noor
Located in Houston, TX
Ceylon Sapphire 12.5 ×10.7, 11.42 cts 2.2 ctw brilliant cut diamonds C. DUNAIGRE SWITZERLAND Certified
Diamond, Sapphire
5 Carat Burma Ruby and Diamond Ring
By Diamond Scene New York
Located in New York, NY
Currently a size 6.5, this ring can easily be resized. Certified by C. Dunaigre Lab of Switzerland.
Diamond, Ruby, 18k Gold, Platinum
Important Burma Ruby and Diamond Earrings
By Diamond Scene New York
Located in New York, NY
Approximately 2 cm x 2 cm Certified by C Dunaigre of Switzerland.
Diamond, Ruby
8.89 Carat Alexandrite Diamond Platinum Ring Henry Birks
Located in New York, NY
Accompanied by a gem report from GIA and C.Dunaigre
Alexandrite, Diamond, Platinum
Gorgeous Platinum Ring with Vivid Red 5.53 Ct Ruby & 1.5 Ct Heart Shape Diamond
By Joël Glecer / Orologio
Located in Antwerp, BE
Gorgeous Platinum Ring With Vivid Red 5.53 Ct Ruby and 1.5 Ct Heart shaped Diamond Ruby: Vivid Red, Cushion Shape Mozambique Ruby 5.53 Ct. Comes with a C. Dunaigre Switzerland Certi...
Diamond, Ruby, Platinum
Impressive 24.64 Carat Ruby and Diamond Ring
By Diamond Scene
Located in New York, NY
The ring is currently a size 7 but can easily be resized. Certified by C Dunaigre of Switzerland. A beautiful ruby ring!
Diamond, White Diamond, Ruby, 18k Gold
Spectra Fine Jewelry Certified 18.38 Carat Zambian Emerald Diamond Ring
By Spectra Fine Jewelry
Located in New York, NY
A cocktail ring comprising an emerald-cut green emerald weighing 18.38 carats. Certified by C. Dunaigre stating that the emerald is of Zambian origin with minor clarity enhancement...
Diamond, Emerald, 18k Gold, Platinum
AGL Certified 3.13 Carat Emerald Diamond White Gold Dangle Earrings
By Peter Suchy
Located in Stamford, CT
Designed and crafted in the Peter Suchy Workshop. 1 octagonal square green emerald, minor approx. 1.66cts AGL certificate# 1128504. C. Dunaigre CDC 22111159 1 octagonal square gree...
Diamond, Emerald, Gold, 18k Gold, White Gold
Unheated Purple Sapphire Ring, 5.04 Carats
Located in New Orleans, LA
A rare natural wonder, this sapphire's vivid deep violet hue is entirely free from treatment, as confirmed by its GRS and C. Dunaigre reports. Purple sapphires are among the rarest a...
Purple Sapphire, Platinum
Untreated Ruby and Diamond Ring 3.02 Carat
Located in New Orleans, LA
This incredible ruby is certified by C. Dunaigre of Switzerland as being Mozambique in origin and completely untreated.
Diamond, Ruby, 18k Gold, Platinum
Untreated Lilac Sapphire and Diamond Necklace
Located in New Orleans, LA
The jewels are certified by C. Dunaigre as being all-natural, with no evidence of heat treatments to enhance the stones' lustrous color.
Diamond, White Diamond, Sapphire, Purple Sapphire, Platinum
Certified 38.53 Carat Sugarloaf Sapphire Diamond Ring
By Spectra Fine Jewelry
Located in New York, NY
The sapphire is certified by C.Dunaigre and GGTL Laboratories stating that it is of Sri-Lankan origin with the indications of heat.
Diamond, Sapphire, Platinum
Spectra Fine Jewelry Certified 15.67 Carat Sapphire Diamond Cocktail Ring
By Spectra Fine Jewelry
Located in New York, NY
The sapphire is accompanied by a report from C. Dunaigre lab, stating that it is of Ceylon origin with the indication of heating.
Diamond, Sapphire, 18k Gold
20.91 Carat Burma No Heat Drop Shape Ruby and Diamond Brooch and Pendant
Located in New York, NY
The center ruby accompanies a gemological report C. Dunaigre stating the country-of-origin for the ruby as Burma (Myanmar) with no indications of heating.
Diamond, Ruby, 18k Gold
19.00 Ctw Art Deco Style Diamond & Colombian Emerald Palladium Ear Clips
Located in Tysons, VA
Gross Weight: 9.07 grams Certification: C. Dunaigre Origin: Colombia
Diamond, Emerald, Palladium
Multicolor Sapphire Mesh Bracelet. 65.53 Carats
Located in New Orleans, LA
Cascading in a mesmerizing rainbow across the design, the blue, purple, pink, orange, yellow and green sapphires are all certified by C. Dunaigre as hailing from coveted origins in S...
Sapphire, Blue Sapphire, Yellow Sapphire, Green Sapphire, 18k Gold, Yell...
Roman Malakov 10.58 Carats Oval Cut Sapphire & Diamond Three-Stone Wedding Ring
By Roman Malakov
Located in New York, NY
A brilliant engagement ring, featuring a 10.58 carats oval cut blue sapphire certified by C. Dunaigre as Ceylon/Sri Lankan origin, set with a timeless four prong setting.
Diamond, Blue Sapphire, Platinum
Roman Malakov 12.82 Carats Emerald & Diamond Three-Stone Engagement Ring
By Roman Malakov
Located in New York, NY
An elegant engagement ring, showcasing a C. Dunaigre certified 12.82 carats emerald cut green emerald, set on a classic four prong setting.
Diamond, Emerald, Platinum
Roman Malakov 16.10 Carats Emerald & Diamond Three-Stone Engagement Ring
By Roman Malakov
Located in New York, NY
A magnificent engagement ring, featuring a C. Dunaigre certified large green emerald cut emerald weighing 16.10 carats, set on a classic four prong setting.
Diamond, Emerald, Platinum
Burma Ruby Earrings, 4.78 Carats
Located in New Orleans, LA
Accompanied by reports from C. Dunaigre confirming their origin, the rubies are further elevated by a refined arrangement of white and yellow diamonds.
White Diamond, Yellow Diamond, Ruby, White Gold
Untreated Yellow Sapphire Line Bracelet, 14.38 Carats
Located in New Orleans, LA
This sunny line bracelet showcases thirty-two magnificent, untreated oval yellow sapphires totaling 14.38 carats, each stone carefully selected for its vibrant golden hue and excepti...
Yellow Sapphire, 18k Gold
Untreated Burma Cabochon Ruby Ring, 6.31 Carats
Located in New Orleans, LA
The exceptional jewel weighs 6.31 carats and its sugarloaf cut perfectly showcases the intense red hue for which Burma rubies are so coveted. Certified by C. Dunaigre Switzerland as ...
Diamond, Ruby, 18k Gold, Yellow Gold, Platinum
Gorgeous Colombian Emerald & Diamond Ring
Located in San Francisco, CA
The ring weighs 7.2 grams, and is currently size 7 1/4, with easy adjustment up or down. Accompanied by C. Dunaigre report #CDC 2408917, dated August 30, 2024, stating: Colombia Orig...
Diamond, Emerald, Platinum
Untreated 4.03 Carat Pink Sapphire Diamond Halo Ring
Located in New Orleans, LA
Certified by C. Dunaigre of Switzerland to be free of heat enhancement, this striking 4.03-carat untreated pink sapphire achieves its mesmerizingly rich rose hue naturally.
Pink Sapphire, Diamond, White Diamond, Platinum
Roman Malakov 2.33 Carats Heart Shape Colombian Emerald & Diamond Halo Necklace
By Roman Malakov
Located in New York, NY
A rare pendant necklace, showcasing a C. Dunaigre certified 2.33 carats heart shape Colombian emerald with VS clarity, set on a three prong setting.
Diamond, Emerald, Platinum, 18k Gold, White Gold
GIA Certified Oval Sapphire & Diamond Halo Ring in 18K White Gold
By Pico Jewelry
Located in New York, NY
Ring contains one center oval brilliant shape sapphire 8.09ct, 4 half-moon diamonds 1.16tcw and round brilliant diamonds 0.94tcw. Center sapphire is C. Dunaigre certified, measuring ...
Diamond, Sapphire, White Gold
6.92 Carat Cushion Cut Red Spinel & Diamond Halo Cocktail Ring in Platinum
By Roman Malakov
Located in New York, NY
A marvelous fashion ring, featuring a C. Dunaigre certified 6.92 carats cushion cut natural red spinel of Burmese origin with no indications of heat treatment.
Diamond, Spinel, Platinum
Emilio Jewelry Certified 8.49 Carat Platinum Emerald Diamond Earrings
By Emilio!
Located in New York, NY
Includes Gemstone Report by C.Dunaigre, Switzerland. For your piece of mind we are a proud Top Selling dealer on 1stdibs, and you will love doing business with us!
Diamond, White Diamond, Emerald, 18k Gold, Platinum
Diana M Platinum 6.83ct Oval Sapphire And 1.90cts Diamond Halo Ring
By Diana M. Jewels
Located in New York, NY
Platinum 6.83ct no heat Ceylon sapphire (C. Dunaigre certified) set with 1.90cts tw of round diamonds in halo setting.
Diamond, Sapphire, Platinum
Diana M 18kt White Gold 7.04ct Emerald and 1.00Cts Diamond Halo Ring
By Diana M. Jewels
Located in New York, NY
18Kt White Gold Ring With 7.04 Ct Cushion Green Emerald, C. Dunaigre Certified (CDC2408543), Set With 1.00 Ct Total Diamond Double Halo.
Diamond, Emerald, 18k Gold, White Gold
Certified 7.96 Carat Zambian Heart-Shaped Emerald Diamond Halo Necklace 18K Gold
By Harbor Diamonds
Located in New York, NY
A truly exceptional gemstone, this necklace showcases a certified 7.96 carat heart-shaped Zambian emerald of remarkable quality. Accompanied by a C. Dunaigre Switzerland Gemstone Rep...
Diamond, Emerald, 18k Gold, Yellow Gold
Diana M. 18 kt white gold stud earrings featuring 7.75 cts tw heart
By Diana M. Jewels
Located in New York, NY
18 kt white gold stud earrings featuring 7.75 cts tw heart shaped emeralds surrounded by 3.77 cts tw of diamonds (C.Dunaigre certified) Diana M. is a leading supplier of top-quality ...
White Gold
Diana M. 18 kt Rose Gold Pink Sapphire and Diamond Earrings Containing 19.20 cts
By Diana M. Jewels
Located in New York, NY
18 kt rose gold pink sapphire and diamond earrings containing 19.20 cts tw of pink sapphires and 15.95 cts tw of diamonds (C.Dunaigre certified) Diana M. is a leading supplier of top...
Diamond, Pink Sapphire, Rose Gold
Diana M. Platinum emerald diamond ring featuring a 7.70 ct cushion cut
By Diana M. Jewels
Located in New York, NY
Platinum emerald diamond ring featuring a 7.70 ct cushion cut emerald with 2 trillions on the side weighing 1.59 cts (C. Dunaigre Certified). Diana M. is a leading supplier of top-qu...
Diamond, Emerald, Platinum
Diana M. 18kt white gold bracelet featuring 155.51cts of unheated pink sapphires
By Diana M. Jewels
Located in New York, NY
18kt white gold bracelet featuring 155.51 cts of unheated pink sapphires and 10.00 cts of round diamonds (C.Dunaigre Certified) Diana M. is a leading supplier of top-quality fine je...
Diamond, White Gold
9.51 ctw No-Heat Pear-Shaped Blue Sapphire Ring in Platinum
By Unbranded
Located in Tysons, VA
Centering a 9.51 carat natural no-heat blue sapphire, this refined cocktail ring features an elegant pear-shaped mixed-cut gemstone with vivid velvety blue color and fine clarity. Ce...
Blue Sapphire, Platinum
21.67 ctw Mid-Century Thai Sapphire & Diamond 14K White Gold Ring
Located in Tysons, VA
Type: Cocktail Ring Era / Style: Mid-Century Metal: White Gold Metal Purity: 14K Setting Style: Prong Band Style: Plain Finish: High Polish Gemstone: Natural Blue Sapphire Origin: Th...
Diamond, Blue Sapphire, 14k Gold, White Gold
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.