Skip to main content

26 Carat Emerald Cut Diamond

to
82
273
32
250
102
88
41
27
21
15
13
10
8
8
7
7
6
6
5
3
3
2
2
2
2
2
2
1
1
1
1
13
7
6
6
4
Sort By
GIA Certified 26 Carat Emerald Cut Diamond Bracelet
By Antinori Fine Jewels
Located in Chicago, IL
26 carats of 42 GIA-certified emerald cut diamonds, each boasting exceptional F color grades and
Category

2010s Unknown Contemporary Tennis Bracelets

Materials

Diamond, White Diamond, Emerald, Platinum

IGL Certified 26 Carat Zambia Emerald Diamonds Cocktail Ring
Located in Massafra, IT
An exquisite and rare big Zambia emerald of 26 carats, fine grade and quality , very hard piece
Category

21st Century and Contemporary Fashion Rings

Materials

Diamond, Emerald, 18k Gold

12.16 Carat Emerald Cut Aquamarine and Diamond Platinum Ring
Located in Chevy Chase, MD
A 12.16 carat emerald cut aquamarine and diamond platinum ring. The aquamarines is set with four
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

Aquamarine, Diamond, Platinum

Gorgeous 26, 88 Carats of Ruby, Emeralds, Diamonds on Brooch
Located in Massafra, IT
cabochon cut of 12,46 ct , a natural emerald cabochon cut of 6,42 ct and natural diamonds baguettes and
Category

21st Century and Contemporary Brooches

Materials

Diamond, Emerald, Ruby, 18k Gold

Tacori 2 Carat Emerald Cut Diamond Engagement Ring Platinum
By Tacori
Located in Honolulu, HI
Item Specifications: Metal: Platinum Diamond Count: 1 emerald and 26 brilliant cut ​ Diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Certified 39.59 Carat Emerald Cut Diamond Tennis Bracelet (1.5 Carat Each)
By Royaal Stones Ltd
Located in Bangkok, Thailand
A beautiful IGI certified, 39.59 carats Emerald Cut Diamond tennis bracelet with 26 pieces of 1.5
Category

21st Century and Contemporary Modern Tennis Bracelets

Materials

Diamond, White Diamond, Gold, 18k Gold

GIA Certified 18.20 Carat Emerald Cut Diamond Platinum Bracelet
By GEMME
Located in New York, NY
This beautiful tennis bracelet features 26 perfectly matched Emerald Cut Diamonds set in East West
Category

2010s American Tennis Bracelets

Materials

Diamond, Platinum

18kt Ring with 11.11 Carat Colombian Emerald & 1.64 Carat Brilliant Cut Diamonds
Located in Antwerp, BE
Cut diamonds. An amazing handcrafted piece of jewelry to enlighten your day after day Emerald
Category

21st Century and Contemporary Belgian Artisan Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

6.26CT Emerald Cut Emerald with Baguette & Round Cut Diamond Side Stone Ring
By Gad & Co.
Located in Miami, FL
baguette-cut Diamonds totaling 1.20 carats, along with 26 Round-cut Diamonds totaling 3.20 carats. Wide
Category

2010s North American Retro Cocktail Rings

Materials

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

Emerald Cut Platinum Eternity Ring 3.53 Carats
Located in Old Tappan, NJ
Classic platinum split prong eternity ring furnished with 26 emerald-cut diamonds totaling 3.53
Category

2010s American Contemporary Bridal Rings

Materials

Diamond, Platinum

AGL Certified No Oil 2.54 Carat Colombian Emerald & Old French Cut Diamond Ring
By Gad & Co.
Located in Miami, FL
AGL Certified No Oil 2.54 Carat Colombian Emerald and French Old Cut Diamond Halo Ring in 18K White
Category

2010s Colombian Art Deco Cocktail Rings

Materials

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

85.78 carats Grand Emerald & Diamond Necklace
By Kaufmann de Suisse
Located in Montréal, CA
square emerald cut diamonds (D-F) totaling 19.34 carats (GIA-certified), 80 square cut emeralds totaling
Category

21st Century and Contemporary Canadian Drop Necklaces

Materials

Diamond, Emerald, 18k Gold

3.80tdw GIA Emerald Cut Diamond Platinum Ring
Located in Cincinnati, OH
diamond weight (estimated). Handmade with serial number 35007 inside band Middle emerald cut diamond
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

26 Carat Blue Topaz and Diamond Ring
Located in Miami, FL
26.75 carat Swiss Blue, blue topaz with an emerald cut 1 carat total weight in diamonds The measurement
Category

2010s American Contemporary Cocktail Rings

Materials

Blue Topaz, Topaz, Diamond, White Gold, 14k Gold

Platinum Ruby & Diamond Ring - 900 Emerald Cut 4.39ctw AGL
Located in Greensboro, NC
Information Natural Ruby Treatment: No Heat, Untreated Carat(s): 3.91ct Cut: Emerald Color: Pinkish Red Origin
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Ruby, Platinum

2.80tcw 14K Gold Natural Emerald-Emerald Cut & Diamond Halo Ring
Located in Jupiter, FL
An important Colombian emerald and diamond men's cocktail ring. A large 2.50-carat emerald is bezel
Category

2010s American Modern Cocktail Rings

Materials

Emerald, Diamond, Yellow Gold, 14k Gold, Gold

5.88 Carat Round Cut Emerald and Diamond Tennis Bracelet in 14K White Gold
Located in NEW YORK, NY
Add color to your style with this gorgeous Emerald bracelet. Features 26 Round cut Emeralds
Category

21st Century and Contemporary American Modern Tennis Bracelets

Materials

Diamond, Emerald, White Gold

1.0 carat Pear, Round-Cut Emerald With Diamond Accents 14K Yellow Gold Earring.
Located in New York, NY
Round-Cut (2 pcs) 0.20 and Round-cut White Diamond (26 Pcs) 0.26 Carat. This Earring is weight 2.09
Category

21st Century and Contemporary Chinese Art Deco Drop Earrings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

1.05 Carat Emerald Cut Diamond Engagement Ring Set in 14 Karat White Gold
Located in Sherman Oaks, CA
markings of "14K". Containing: One prong set emerald shaped cut diamond measuring 5.80 x 3.90 x 2.40 mm
Category

2010s Engagement Rings

Materials

Diamond, 14k Gold, White Gold

AGL Certified 3.13 Carat Emerald Diamond White Gold Dangle Earrings
By Peter Suchy
Located in Stamford, CT
cut diamonds, G VS approx. .78cts 26 round brilliant cut diamonds, G VS approx. 2.09cts 18k white gold
Category

21st Century and Contemporary Dangle Earrings

Materials

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

Art Deco Inspired .83 Carat Diamond Emerald Platinum Ring
Located in Beverly Hills, CA
: 36 Diamonds Cut: Round Brilliant Cut Weight: 0.39 Carat Color: H Clarity: VS Accent Stone: 26
Category

Vintage 1920s Art Deco Cocktail Rings

Materials

Diamond, Emerald, Platinum

26 carat Aquamarine and Diamond Halo Ring mounted in platinum
By codebyEdge
Located in London, GB
diamond slanting beveled surround to enhance the lightness of the design. The cut-cornered old material
Category

2010s English Modern Cocktail Rings

Materials

Aquamarine, Diamond, Platinum

Peter Suchy GIA 1.89 Carat Emerald Diamond Yellow Gold Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Natural bluish green 1.89 carat emerald and diamond pendant necklace. This rare GIA certified
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Emerald, Gold, 14k Gold, Yellow Gold

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
Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond, White Diamond, Emerald, 18k Gold, Platinum

Custom Iced Out VS1 Emerald Cut Diamonds Cartier Santos Wrist Watch
By Cartier
Located in New York, NY
and emerald cut diamonds !! WE HAVE EXTRA LINKS AVAILABLE!! G COLOR VS1 CLARITY 26 carats in
Category

2010s Swiss Wrist Watches

Materials

Diamond, Emerald

Cartier Santos Iced Out VVS Emerald Cut Diamond Roman Numeral Watch
By Cartier
Located in New York, NY
white natural round and emerald cut diamonds 26 carats in collection quality diamonds also available
Category

2010s Swiss Wrist Watches

Materials

Diamond

Cartier Santos Custom Iced Out VVS Emerald Cut Diamond Roman Numeral Watch
By Cartier
Located in New York, NY
white natural round and emerald cut diamonds 26 carats in collection quality diamonds also available
Category

2010s Swiss Wrist Watches

Materials

Diamond, Emerald

AIG Certified 54.00 Carat Zambian Emeralds 14.00 Ct Diamonds 18K Gold Necklace
Located in Massafra, IT
Diamonds, in round brilliant cut, of 14,00 carats, F-G color VS clarity, very sparkly. Handcrafted by
Category

21st Century and Contemporary Necklace Enhancers

Materials

Diamond, Emerald, 18k Gold

Custom Iced Out Emerald Cut Diamonds Rolex Datejust Wrist Watch
By Rolex
Located in New York, NY
and emerald cut diamonds 26 carats in collection quality diamonds fully iced out diamond dial and
Category

2010s Swiss Art Deco Wrist Watches

Materials

Diamond, 18k Gold

4.13 Carats Zambian Emerald Diamond 14 Karat Gold Hoop Stud Earrings
By Meghna Jewels
Located in Hoffman Estate, IL
Weight :- 8.0 gram 14k White Gold Weight :- 7.17 gram Diamond Weight :- 2.21 carat Emerald Weight
Category

21st Century and Contemporary Contemporary Hoop Earrings

Materials

Diamond, Emerald, Gold, 14k Gold

Spectra Fine Jewelry AGL Certified 7.05 Carat Colombian Emerald Diamond Ring
By Spectra Fine Jewelry
Located in New York, NY
of 34 mixed diamonds — 26 round brilliants and 8 baguettes totaling approximately 1.78 carats — the
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Diamond, Emerald, Platinum

2.80 Carat Square Colombian Emeralds and Diamond Engagement Ring White Gold
Located in US
This stunning Engagement Ring is centered by one natural Colombian emerald square cut 1.10 carat
Category

2010s American Contemporary Engagement Rings

Materials

Emerald, Diamond, White Gold, 14k Gold

MISSIAN JEWELLERY 18kt gold ring with 0.208 carat diamond and 0.44 carat emerald
Located in Cascais, Lisboa
Designed in 3D programming, this ring in the shape of a Greek Eye has a 6x3 mm Navete-cut emerald
Category

2010s Portuguese Greek Revival Fashion Rings

Materials

Diamond, Emerald, Gold, 18k Gold

18K Emerald 26 Pcs Emerald Stud Earrings Long Bar Studs Delicate Gold Earrings
By Oshi Jewels
Located in Bangkok, TH
are made of 18K solid gold featuring shiny brilliant round cut natural Emerald Gemstone set by master
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

Emerald, 18k Gold, Rose Gold, White Gold, Yellow Gold

Emerald Cut Morganite and Diamond Drop Earrings in 14K White Gold
Located in Bangkok, TH
Express yourself with these insanely stylish, stunningly detail earrings with emerald cut peach
Category

21st Century and Contemporary Thai Art Deco Drop Earrings

Materials

Diamond, Emerald, Morganite, 14k Gold, White Gold

1.15tcw 14K Colombian Emerald-Round Cut & Diamond Accent Engagement Ring
Located in Jupiter, FL
Featured is a stunning Colombian emerald and diamond engagement ring. The center of attention is a
Category

2010s American Modern Engagement Rings

Materials

Emerald, Diamond, Yellow Gold, 14k Gold, Gold

19th Century 4.50 Carat Cabochon Emerald Diamonds Duchess Ring
Located in Poitiers, FR
ring, it is set with a cabochon emerald in closed setting surmounted by 2 antique cushion- cut diamonds
Category

Antique Late 19th Century French Napoleon III Engagement Rings

Materials

Diamond, White Diamond, Emerald, Gold, 18k Gold, Yellow Gold, Silver, St...

18k Rose Gold Square Studs Diamond Emerald Cut Stud Earrings Diamond Cluster
By Oshi Jewels
Located in Bangkok, TH
Diamond Emerald Cut Stud Earrings in 18k Rose Gold, Yellow Gold, White Gold. These Dainty Stud
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

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

14k Gold Square Studs Diamond Emerald Cut Stud Earrings Diamond Cluster Stud
By Oshi Jewels
Located in Bangkok, TH
Diamond Emerald Cut Stud Earrings in 14k Rose Gold, Yellow Gold, White Gold. These Dainty Stud
Category

21st Century and Contemporary Thai Modern Stud Earrings

Materials

Diamond, 14k Gold, Rose Gold, White Gold, Yellow Gold

AGL Certified 15.78 Carat No Oil Brazil Emerald & Diamond Ring in 18K Gold
By Gad & Co.
Located in Miami, FL
18 karat white gold emerald and diamond ring. Set with over 20 carats in natural emerald diamonds
Category

2010s Brazilian Art Deco Cocktail Rings

Materials

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

Classic Pear Cut Emerald and White Diamond 14K Yellow Gold Ring
Located in New York, NY
, along with Natural Round cut white Diamond (26 Pcs) 0.24 Carat, Natural Princess cut Diamond (1 Pcs
Category

20th Century Chinese Art Deco Bridal Rings

Materials

White Diamond, Emerald, 14k Gold, Yellow Gold

Art Deco Style 2 Carat Ring Natural Green Emerald and Diamond Cocktail
Located in Los Angeles, CA
color and VS-SI clarity diamonds approximately 1 carat total, 26 of which are round and the remaining 12
Category

Vintage 1960s Unknown Art Deco Cocktail Rings

Materials

White Diamond, Emerald, Diamond, 14k Gold

Classic Cluster Earrings In 18Kt Gold With 7.78 Carats In Diamonds And Emeralds
Located in Miami, FL
A classic pair of earrings with Emeralds and diamonds. Very beautiful pair of earrings, crafted
Category

Vintage 1970s American Modernist Clip-on Earrings

Materials

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

Classic Emerald Diamond Ring 18 Karat Gold
Located in US
brilliant round cut diamonds H/SI2 Approx. 0.25 carat Ring Weight: 4.9 grams Emerald measurement
Category

Early 2000s Unknown Art Deco Engagement Rings

Materials

Diamond, Emerald, 18k Gold, Gold

22tcw 18K Gold Regal Emerald & Diamond Choker Necklace Vivid Green Oval Emerald
Located in Jupiter, FL
masterpiece features 26 oval-cut emeralds, each boasting a vivid rich emerald green color, dark tone, and
Category

2010s Zambian Modern Pendant Necklaces

Materials

Diamond, Emerald, 18k Gold

9.94 Carat Natural Emerald Diamond Tennis Bracelet in 14k Solid Yellow Gold
By VR Jewels
Located in New York, NY
This 9.94 Carat Natural Emerald Diamond Tennis Bracelet in 14K gold showcases endlessly sparkling
Category

21st Century and Contemporary American Art Deco Tennis Bracelets

Materials

Diamond, Emerald, Gold, 14k Gold, Yellow Gold

Alexander Beverly Hills 3.95ct D-F Emerald Cut Diamond Eternity Band 18k S.6.5
By Alexander Beverly Hills
Located in BEVERLY HILLS, CA
Stunning emerald cut diamond eternity band, by Alexander Beverly Hills. 26 emerald cut diamonds
Category

21st Century and Contemporary American Contemporary Wedding Rings

Materials

Diamond, Gold, 18k Gold, White Gold

Freeform Chatham Emerald Diamond Gold Earrings
Located in Honolulu, HI
Gemstone: Chatham emerald Diamond Color: G-I Diamond Clarity: VS1-SI1 Diamond Carat Weight: 1.40 carat
Category

Late 20th Century American Modern Stud Earrings

Materials

Diamond, Emerald, Gold, 14k Gold, Yellow Gold

14K Yellow Gold 5.77 Carat Oval Cabochon Emerald & Diamond Cocktail Ring, Size 6
Located in Holtsville, NY
round brilliant diamonds (0.15 carats) and 26 single cut diamonds (0.10 carats), adding extra sparkle
Category

2010s American Artist Cocktail Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

50 Carat Ceylon Sapphire Diamonds Bracelet
By Antinori Fine Jewels
Located in Chicago, IL
Set with thirteen graduated step-cut emeralds weighing 26 carats in total, spaced by thirteen
Category

2010s Unknown Contemporary Chain Bracelets

Materials

Diamond, White Diamond, Sapphire, Platinum

0.83 carats Emerald and 0.76 Sapphire ring
Located in New York, NY
that seamlessly marries artistry with luxury. Six resplendent pear-cut emeralds, totaling 0.83 carats
Category

2010s Indian Modern Cocktail Rings

Materials

Sapphire, Emerald, Diamond, White Gold, 18k Gold

Emerald Sapphire Diamond Yellow Gold Cocktail Ring
By Roshe Jewels
Located in Los Angeles, CA
of the Emerald are 10mm x 12mm) 16 Orange Sapphires = 2.20 carats 26 Round Cut Diamonds = 0.29 carats
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

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

Natural Colombian Emerald Diamond Ring 14k W Gold 0.80 TCW Certified
Located in Brooklyn, NY
DETAILS Stone: Colombian Emerald, Diamond Species & Variety: Natural Beryl/Emerald Stone Cut: Round Mixed
Category

2010s American Engagement Rings

Materials

Diamond, Emerald, Gold

Opal Emerald Diamond 18 Karat Gold Ring
By Meghna Jewels
Located in Hoffman Estate, IL
emerald, .26 carats blue sapphire and 0.37 carats of sparkling diamonds. The ring is a size 7 and may be
Category

21st Century and Contemporary Unknown Contemporary Cocktail Rings

Materials

Diamond, Emerald, Opal, Blue Sapphire, Gold, 18k Gold

Antique Colombian Emerald Diamond Convertible Bracelet Pendant Russian 1890s
Located in Chicago, IL
emerald weight is 2.48 carats. Estimated combined diamond weight is 5.50 carats. The emerald and diamond
Category

Antique 1890s Russian Victorian Link Bracelets

Materials

Emerald, White Diamond, Diamond, Silver, 14k Gold, Gold

58 Ct. Emerald Baguette Diamond Choker Necklace
Located in Chicago, IL
Square-cut emeralds, baguette-cut diamonds, platinum emeralds: 26 square-cut with approximate
Category

2010s American Contemporary Choker Necklaces

Materials

Diamond, Platinum

Natural Emerald Diamond Pendant Necklace 15" 14k WG 4.06 TCW Certified
Located in Brooklyn, NY
Emerald, Diamond Species & Variety: Natural Beryl/Emerald Stone Cut: Oval Stone Color: Green Transparency
Category

2010s Italian Pendant Necklaces

Materials

Diamond, Emerald, 14k Gold

Emerald Opal Topaz Diamond 18 Karat Gold Linear Earrings
By Meghna Jewels
Located in Hoffman Estate, IL
carats carved Emerald, .26 carats opal doublet, .84 carats topaz and .16 carats of glimmering diamonds
Category

21st Century and Contemporary Modern Drop Earrings

Materials

Diamond, Emerald, Opal, Topaz, Gold, 18k Gold

Tacori Diamond Certified Zambian Emerald Platinum Engagement Ring
By Tacori
Located in Miami, FL
minor treatment, prong-set, octagonal cut, weight approximately 1.46 carats.  Adorning Emerald's sides
Category

21st Century and Contemporary American Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

Vintage Victorian Revival 14k Gold 14.60ct GIA Emerald & Diamond Bangle Bracelet
Located in Montclair, NJ
--Stone(s):-- (9) Natural Genuine Emeralds - Octagonal Cut - Prong Set - Bright Vivid Green Color
Category

21st Century and Contemporary Revival Bangles

Materials

Diamond, Emerald, 14k Gold

  • 1
Get Updated with New Arrivals
Save "26 Carat Emerald Cut Diamond", and we’ll notify you when there are new listings in this category.

26 Carat Emerald Cut Diamond For Sale on 1stDibs

You are likely to find exactly the 26 carat emerald cut diamond you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from gold, 18k gold and white gold — can elevate any look. Our collection of these items for sale includes 497 vintage editions and 613 modern creations to choose from as well. You’re likely to find the perfect 26 carat emerald cut 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. Finding an appealing 26 carat emerald cut diamond — no matter the origin — is easy, but Meghna Jewels, Roshe Jewels and Georgios Collections Inc each produced a popular version that is worth a look. See these pages for an emerald cut iteration of this accessory, while there are also round cut cut and oval cut cut versions available here, too. Most of our 26 carat emerald cut diamond for sale are for women, but there are 305 pieces available to browse for men.

How Much is a 26 Carat Emerald Cut Diamond?

The price for a 26 carat emerald cut diamond starts at $1 and tops out at $810,802 with these rings, on average, selling for $8,599.

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.