Skip to main content

Pendant 6 Carat Sapphire Gia

to
43
61
241
28
13
6
5
3
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Sort By
GIA Certified 3.79 Carat Natural, Ceylon Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 3.79 Carat, Natural, Ceylon (Sri Lankan) Sapphire and 0.73
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 4.73 Carat Natural, Unheated Ceylon Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 4.73 Carat, Natural Unheated, Ceylon Blue Sapphire and
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 5.30 Carat Natural Unheated Ceylon Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 5.30 Carat, Natural Unheated, Ceylon Blue Sapphire and
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 3.93 Carat Natural Burmese, Unheated Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 3.93 Carat Natural Burmese, Unheated Sapphire and 1.71
Category

20th Century Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 6.75 Carat Natural Ceylon Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 6.75 Carat Natural, Ceylon (Sri Lanka) Sapphire and 1.67
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Gia Certified 4.90 Carat Natural Yellow Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 4.90 Carat Natural, Yellow Sapphire and 1.17 Carats
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Yellow Sapphire, Platinum

GIA Certified 2.10 Carat Unheated, Sri Lankan Sapphire Ring set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 2.10 Carat Natural, Unheated/Untreated, Sri Lankan Blue
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 2.02 Carat Natural Ceylon Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 2.02 Carat Natural Ceylon Sapphire and 0.65 Carats
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 1.73 Carat Natural African Blue Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful Ring featuring a GIA Certified 1.73 Carat Natural Madagascar Blue Sapphire and 1.08
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 2.82 Carat Natural, Unheated, Ceylon Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 2.82 Carat Natural Unheated, Ceylon (Sri Lankan) Sapphire
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Sapphire, Platinum

GIA Certified 4.88 Carat, Natural Sapphire and Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning Ring featuring a GIA Certified 4.88 Carat, Natural Sapphire and 0.48 Carats of Trillion
Category

21st Century and Contemporary Japanese Modern Three-Stone Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 1.34 Carat, Natural, Burmese No Heat Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 1.34 Carat, Natural, Burmese, Unheated Sapphire and 0.76
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Gia Certified 3.64 Carat Natural Royal Blue Ceylon Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful Cocktail ring featuring a GIA Certified 3.64 Carat Natural Ceylon, Royal Blue Sapphire
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 3.50 Carat Natural Blue Sapphire and Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful Engagement Ring featuring a GIA Certified, 3.50 Carat, Natural Sapphire and 0.99 Carats
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 1.58 Carat Natural Ceylon Royal Blue Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful Ring featuring a GIA Certified 1.58 Carat Natural Sri Lankan/Ceylon Royal Blue Sapphire
Category

21st Century and Contemporary Japanese Modern Cluster Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 2.02 Carat, Color-Change Sapphire and Diamond Ring set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 2.02 Carat Natural Color-Change Sapphire and 0.74 Carats
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 3.53 Carat Madagascar Sapphire and Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning Engagement Ring featuring a GIA Certified 3.53 Carat Madagascar Heat Sapphire and 0.69
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 5.65 Carat Natural, Unheated Yellow Sapphire Ring Set in Platinum
Located in Tokyo, JP
A stunning ring featuring a GIA Certified 5.65 Carat Natural Unheated Yellow Sapphire and 1.83
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Yellow Sapphire, Platinum

GIA Certified 9.78 Carat Natural Yellow Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning Cocktail Ring featuring a GIA Certified 9.78 Carat Natural Yellow Sapphire and 0.58
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Yellow Sapphire, Platinum

GIA Certified 1.08 Carat, No Heat Sapphire and Diamond Halo Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 1.08 Carat, Natural Unheated Sapphire and 0.76 Carats
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 5.06 Carat Natural Pink Sapphire Ring Set in Platinum and 18K Gold
Located in Tokyo, JP
An elegant Cocktail ring with a GRS lab certified 5.06 Carat, Natural Pink Sapphire and 0.95 Carats
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Pink Sapphire, Platinum, 18k Gold

1.77 Carat Natural Madagascan Sapphire and Diamond Ring set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 1.77 Carat Natural Blue Sapphire from Madagascar and 0.59
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

1.91 Carat, Natural, Untreated, Ceylon Sapphire Tank Ring Set in Platinum
Located in Tokyo, JP
A beautiful GIA certified 1.91 Carat Oval-Shaped, Natural, Ceylon Sapphire Tank Ring set in
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Sapphire, Platinum

1.45 Carat, Natural, Ceylon, Royal Blue Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful Engagement Ring featuring a GIA Certified, 1.45 Carat, Natural, Sri Lankan (Ceylon
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

2.94 Carat Royal Blue Ceylon Sapphire and Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning Double Halo Ring featuring a GIA Certified 2.94 Carat Sri Lankan/Ceylon Sapphire and
Category

2010s Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Royal Blue 2.36 Carat Untreated Burmese Sapphire Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning Engagement/Cocktail Ring featuring a GIA Certified 2.36 Carat Royal Blue, Untreated
Category

2010s Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 0.65 Carat Neon, Brazilian Paraiba Tourmaline Diamond Ring
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 0.65 Carat Natural Brazilian Paraiba Tourmaline and 0.19
Category

20th Century Japanese Modern Cocktail Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 0.26 Carat Neon, Brazilian Paraiba Tourmaline Diamond Ring
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 0.26 Carat Natural Brazilian Paraiba Tourmaline and 0.17
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 1.30 Carat Natural Paraiba Tourmaline Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 1.30 Carat Natural Mozambique Paraiba Tourmaline and
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 0.17 Carat Natural Brazilian Paraiba Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 0.17 Carat Natural Brazilian Paraiba Tourmaline and 0.44
Category

21st Century and Contemporary Japanese Modern Cluster Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 0.89 Carat Natural Brazilian Alexandrite Ring Set in Platinum
Located in Tokyo, JP
A gorgeous ring featuring a GIA Certified 0.89 Carat, Natural Brazilian Alexandrite and 0.34 Carats
Category

20th Century Japanese Modern Engagement Rings

Materials

Alexandrite, Diamond, Platinum

GIA Certified 3.28 Carat Natural Brazilian Paraiba Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified Carat Natural Brazilian Paraiba Tourmaline and 0.71
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 2.22 Carat Natural Colombian Emerald Ring Set in Platinum
Located in Tokyo, JP
A stunning ring featuring a GIA Certified 2.22 Carat Natural Colombian Emerald and 1.32 Carats of
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Emerald, Gold, 18k Gold, Platinum

GIA Certified 0.32 Carat Brazilian Paraiba Tourmaline Ring Set in Platinum
Located in Tokyo, JP
A beautiful and elegant ring featuring a GIA Certified 0.32 Carat Trillion Cut Paraiba Tourmaline
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 1.09 Carat Natural Brazilian Paraiba Ring Set in Platinum
Located in Tokyo, JP
A beautiful Halo Ring featuring a GIA Certified 1.09 Carat Natural Brazilian Paraiba Tourmaline and
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 3.84 Carat Natural Colombian Emerald Diamond Ring Set Platinum
Located in Tokyo, JP
A stunning Halo Ring featuring a GIA Certified 3.84 Carat Natural Colombian Emerald and 1.44 Carats
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Emerald, Platinum

GIA Certified 2.09 Carat Natural Untreated Red Spinel Double Halo Ring
Located in Tokyo, JP
A beautiful cocktail ring consisting of a GIA certified 2.09 Carat Natural Untreated Red Spinel and
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Spinel, Platinum

GIA Certified 0.97 Carat No Oil (Untreated), Colombian Emerald Diamond Ring
Located in Tokyo, JP
A stunning ring featuring a GIA Certified 0.97 Carat Natural, Colombian, Untreated (No Oil) Emerald
Category

21st Century and Contemporary Japanese Modern Three-Stone Rings

Materials

Diamond, Emerald, Platinum

GIA Certified 2.30 Carat Natural Untreated No Heat Burmese Ruby Ring
Located in Tokyo, JP
A beautiful ring set in Platinum featuring GIA certified 2.30 Carats Natural Untreated (No Heat
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 0.49 Carat Neon Blue, Brazilian Paraiba Tourmaline Diamond Ring
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 0.49 Carat Natural Brazilian Paraiba Tourmaline and 1.16
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Tourmaline, Paraiba, Platinum

GIA Certified 0.26 Carat Brazilian Paraiba Tourmaline Ring set in Platinum
Located in Tokyo, JP
Tourmaline and 0.31 carat of Diamond Accents set in Platinum. The center Paraiba Tourmaline comes with a GIA
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Tourmaline, Paraiba, Diamond, Platinum

GIA Certified 1.23 Carat Natural Colombian Emerald Ring Set in Platinum
Located in Tokyo, JP
A stunning Ring featuring a 1.23 Carat Natural, Colombian Emerald and 1.13 Carats of Diamond
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Emerald, Platinum

GIA Certified 1.55 Carat Colombian Emerald and Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning ring featuring a GIA Certified 1.55 Carat Natural Colombian Emerald and 0.31 Carats of
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Emerald, Platinum

GIA Certified 1.27 Carat Colombian Emerald and Diamond Ring Set in Platinum
Located in Tokyo, JP
A stunning ring featuring a GIA Certified 1.27 Carat Natural, Colombian Emerald and 1.68 Carats of
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Emerald, Platinum

GIA Certified 1.15 Carat Untreated (No Oil) Colombian Emerald Ring in Platinum
Located in Tokyo, JP
A stunning Engagement/Cocktail ring featuring a 1.15 Carat GIA certified No Oil Colombian Emerald
Category

20th Century Japanese Art Deco Cocktail Rings

Materials

Diamond, Emerald, Platinum

Gia Certified 0.92 Carat Natural Thai Siam Ruby Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring set in Platinum featuring GIA Certified 0.92 Carat Natural Thailand Ruby and 0.85
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 4.09 Carat Unheated Rubies Diamonds Cluster Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring set in Platinum featuring GIA Certified 4.098 Carat Natural Untreated/Unheated
Category

21st Century and Contemporary Japanese Modern Cluster Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 1.38 Carat Brazilian Alexandrite and Diamond Ring Set in Platinum
Located in Tokyo, JP
A gorgeous ring featuring a GIA Certified 1.38 Carat, Natural Brazilian Alexandrite and 0.53 Carats
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Alexandrite, Diamond, Platinum

GIA Certified 2.04 Carat Burmese Ruby and Diamond Ring sSet in Platinum
Located in Tokyo, JP
A beautiful Ring set in Platinum featuring a GIA Certified 2.04 Carat Natural Burmese (Myanmar
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 1.32 Carat Natural Siam, Untreated Ruby Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring set in Platinum featuring a GIA Certified 1.32 Carat Natural Thai (Siam
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold, Platinum

GIA Certified 1.39 Carat, Brazilian Alexandrite and Diamond Ring Set in Platinum
Located in Tokyo, JP
A gorgeous Ring featuring a GIA Certified 1.39 Carat, Natural Alexandrite and 2.40 Carats of
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Alexandrite, Diamond, Platinum

GIA Certified 0.76 Carat Natural Colombian No Oil Emerald Set in Platinum
Located in Tokyo, JP
A stunning Estate Ring featuring a GIA Certified 0.76 Carat Natural Colombian No Oil Emerald and
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Emerald, Platinum

GIA Certified 0.92 Carat Brazilian Alexandrite and Diamond Ring set in Platinum
Located in Tokyo, JP
A gorgeous ring featuring a GIA Certified 0.92 Carat, Natural Brazilian Alexandrite and 0.31 Carats
Category

20th Century Japanese Modern Cocktail Rings

Materials

Alexandrite, Diamond, Platinum

GIA Certified 0.99 Carat Unheated Ruby and Diamond Ring set in Platinum
Located in Tokyo, JP
A beautiful Ring set in Platinum featuring a GIA Certified 0.99 Carat Natural Untreated (Unheated
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 1.19 Carat Paraiba Tourmaline and Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 1.19 Carat Natural Mozambican (South East Africa
Category

21st Century and Contemporary Japanese Modern Fashion Rings

Materials

Tourmaline, Paraiba, Diamond, Platinum

GIA Certified 1.13 Carat Natural Burmese Ruby Diamond Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring set in Platinum featuring a GIA Certified 1.13 Carat Natural Burmese Ruby and 0.46
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

GIA Certified 1.15 Carat Natural Burmese Untreated Ruby Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring set in Platinum featuring a GIA Certified 1.15 Carat Natural Burmese, Unheated
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

  • 1
Get Updated with New Arrivals
Save "Pendant 6 Carat Sapphire Gia", and we’ll notify you when there are new listings in this category.

Pendant 6 Carat Sapphire Gia For Sale on 1stDibs

Find the exact pendant 6 carat sapphire gia you’re shopping for in the variety available on 1stDibs. Each design created in this style — which was crafted with great care and often made from Gold, White Gold and 18k Gold — can elevate any look. In our selection of items, you can find a vintage example as well as a contemporary version. If you’re looking for a pendant 6 carat sapphire gia from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 19th Century while another version may have been produced as recently as the 21st Century. A pendant 6 carat sapphire gia from Sarosi By Timeless Gems, Peter Suchy and Fine Jewels UK — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for an oval cut iteration of this accessory, while there are also cushion cut cut and pear cut cut versions available here, too. Finding a pendant 6 carat sapphire gia for sale for women should be easy, but there are 23 pieces available to browse for unisex as well as men, too.

How Much is a Pendant 6 Carat Sapphire Gia?

On average, a pendant 6 carat sapphire gia at 1stDibs sells for $10,724, while they’re typically $616 on the low end and $235,600 for the highest priced versions of this item.

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.