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Victorian 2.64 CTW Oval Cut No Heat Sapphire Old European Cut Diamond Ring
Located in Philadelphia, PA
Centering an oval cut sapphire weighing 1.36 carats - transparent dark blue in color Natural
Category

1880s Victorian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 14k Gold, Yellow ...

Edwardian 1.85 Carat No Heat Sapphire Diamond Platinum 18 Karat Gold Floral Ring
Located in Philadelphia, PA
Centering a bezel set round cut sapphire weighing approximately 1.45 carats total, medium-dark
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow ...

Edwardian GIA 4 carat no heat sapphire diamond 18k white gold cluster ring
Located in Beverly Hills, CA
This Edwardian 18k white gold ring centers a mesmerizing 4 carat GIA-certified no-heat Ceylon
Category

1910s Edwardian Antique No Heat Sapphire

Materials

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

Victorian 2.86 CTW No Heat Sapphire Diamond 18 Karat Gold Halo Ring GIA
Located in Philadelphia, PA
Centering a cushion cut sapphire weighing 1.33 carats - transparent deep royal blue Natural
Category

Early 1800s Victorian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Gold, 18k Gold, Yellow Gold

Antique Victorian 14k Gold 2.40ct AGL Burma No Heat Sapphire Diamond Halo Ring
Located in Montclair, NJ
You are looking at a truly breathtaking antique sapphire and diamond engagement ring that was
Category

1890s Victorian Antique No Heat Sapphire

Materials

Diamond, Sapphire, 14k Gold, Yellow Gold

Tiffany Co. Antique Art Deco Cambodian No Heat Sapphire and Diamond Ring, GIA
By Tiffany Co.
Located in New York, NY
Heat Blue Sapphire GIA certified flanked on either side by Old European Cut diamonds weighing
Category

Early 19th Century Unknown Art Deco Antique No Heat Sapphire

Materials

White Diamond, Blue Sapphire, Platinum

Antique 14k Gold Bezel Old Pear GIA No Heat Sapphire Solitaire Pendant Necklace
Located in Montclair, NJ
Victorian era. It features a beautiful, GIA certified, old pear cut sapphire with rounded edges that is
Category

Late 19th Century Unknown Late Victorian Antique No Heat Sapphire

Materials

Sapphire, 14k Gold, Yellow Gold

Antique Tiffany Co. AGL 4.33 Carat Kashmir No Heat Sapphire Diamond Gold Ring
By Tiffany Co.
Located in Beverly Hills, CA
One Antique Tiffany & Company AGL Kashmir Sapphire Diamond 18 Karat Gold Ring. Featuring one AGL
Category

1910s American Edwardian Antique No Heat Sapphire

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold, Platinum, Gold

Victorian 4.10 CTW No Heat Sapphire Diamond 18 Karat Gold Antique Band Ring GIA
Located in Philadelphia, PA
Featuring five cushion cut sapphires graduating in size and flush set east to west Weighing
Category

1860s Victorian Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Gold, 18k Gold, Yellow Gold

Antique Art Deco 14k Yellow Gold GIA 1.16ct Oval No Heat Sapphire Filigree Ring
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Sapphire - Oval Brilliant Cut - Multi Prong Set - Deep Royal Blue
Category

19th Century Art Deco Antique No Heat Sapphire

Materials

Sapphire, Gold, 14k Gold, Yellow Gold

Art Deco 2.85 CTW No Heat Sapphire Diamond Platinum Antique Scroll Halo Ring GIA
Located in Philadelphia, PA
Centering a cushion cut sapphire weighing approximately 2.21 carats - transparent dark blue Natural
Category

1920s Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Victorian 1.75 Carats Diamond No Heat Sapphire 18 Karat Gold Toi Et Moi Ring GIA
Located in Philadelphia, PA
and VS clarity Cambodian sapphire is brightly royal blue in color with no indications of heat while
Category

Early 1900s Victorian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow ...

1.32 Carat No Heat Sapphire 14 Karat Gold Anemoi God of Wind Ring AGL Carter
By Carter Gough Co.
Located in Philadelphia, PA
Centering an oval cut sapphire weighing 1.32 carats, bright blue with no evidence of heat treatment
Category

Early 20th Century American Art Nouveau Antique No Heat Sapphire

Materials

Blue Sapphire, 14k Gold

Art Deco Natural No Heat 4.41 Carat Sapphire Platinum Ring
Located in Lexington, KY
features a 4.41 carat Natural, No heat Sapphire. The original Art Deco Platinum ring is from circa 1925
Category

1920s Art Deco Antique No Heat Sapphire

Materials

Blue Sapphire, Diamond, Platinum

Sapphire Diamond Ring c1915
Located in Chicago, IL
totaling 1.04 Carats and 3 Old Cut Natural No Heat Sapphires totaling 1.60 Carats. Halls marks are a bit
Category

Late 19th Century Unknown Victorian Antique No Heat Sapphire

Materials

Diamond, Sapphire, 18k Gold

Sapphire and Diamond Ring GIA Certified No-Heat Edwardian Era
Located in Northampton, MA
A line of one cushion and two octagonal mixed-cut GIA-certified no-heat sapphires totaling
Category

Early 20th Century Unknown Edwardian Antique No Heat Sapphire

Materials

Diamond, Sapphire, 18k Gold

Art Nouveau GIA Ceylon No Heat 3.15 Carat Sapphire Gold Three Stone Ring
Located in Beverly Hills, CA
One Art Nouveau GIA Ceylon No Heat 3.15 Carat Sapphire Three Stone Ring. Featuring one GIA oval
Category

1910s Art Nouveau Antique No Heat Sapphire

Materials

Diamond, Sapphire, Blue Sapphire, Gold, Yellow Gold, 14k Gold

Art Deco Gold and Platinum Ring set with a 11.92ct No Heat Ceylon Sapphire AGL
Located in Litchfield, CT
Circa 1920s, Platinum and 18k. Set with a stunning 11.92 carat sapphire (No Heat, Ceylon origin
Category

1920s Art Deco Antique No Heat Sapphire

Materials

White Diamond, Blue Sapphire, Sapphire, 18k Gold, Yellow Gold, Platinum,...

2.08 Carat Art Deco Blue Natural Sapphire Diamond Platinum Earrings
Located in Stamford, CT
Art Deco cornflower blue natural no heat Sapphire and diamond dangle earrings. 2 fine cornflower
Category

Early 20th Century Antique No Heat Sapphire

Materials

Blue Sapphire, Diamond, Sapphire, Platinum

Art Deco Burma Sapphire Diamond Platinum Ring
Located in Aspen, CO
Central fancy cut natural sapphire is accompanied by a AGL Report stating classic Burma no heat
Category

Early 20th Century American Art Deco Antique No Heat Sapphire

Materials

Blue Sapphire, Diamond, Platinum

Victorian Kashmir Sapphire Diamond Gold and Silver Cluster Engagement Ring
Located in Beverly Hills, CA
. Featuring a rare 0.71 carat velvet blue Kashmir no heat sapphire that is certified by both GRS and GIA
Category

19th Century Unknown Victorian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Blue Sapphire, 18k Gold, Silver

GIA Certified Sapphire Art Deco Diamond Platinum Ring
Located in Beverly Hills, CA
Sapphires come in many colors and this GIA certified no heat sapphire shows off the beauty of
Category

1920s Unknown Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

2.11 Carat No-Heat Blue Sapphire Diamond Platinum 900 Three-stone Ring
Located in Bangkok, TH
. At the center lies a cushion-cut 2.11 Carat no-heat Sapphire gemstone. The sapphire, known for its
Category

18th Century Victorian Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Platinum

Art Deco 1.81 Carat Diamond and Sapphire Platinum Ring
Located in Miami, FL
clarity and a 2.06ct AGL no heat sapphire. The ring size is currently 5.75 but can be sized up or down
Category

1920s American Art Deco Antique No Heat Sapphire

Materials

Blue Sapphire, Diamond, White Diamond, Platinum

Edwardian Violet Blue Sapphire Diamond Ring
Located in Stamford, CT
oval light violetish blue Sapphire, approx. total weight 3.38cts, SI2, Sri Lanka, natural no heat
Category

20th Century Georgian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Yellow Gold, Platinum, 18k Gold

Natural Sapphire Diamond Bow Ring
Located in Stamford, CT
way. It is certified by the AGL as natural, no heat non enhanced corundum sapphire. 1 emerald cut
Category

Early 20th Century Unknown Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Art Deco GIA 2.09 Carat No-Heat Blue Sapphire 18 Karat Rose Gold Ring
Located in Addison, TX
Superb Deco elegance is exhibited in this ring! The center is an outstanding rare "no heat
Category

1920s Unknown Art Deco Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Rose Gold

Antique Art Nouveau Ceylon Cushion 2.57 Carat Sapphire Yellow Gold Ring
Located in London, GB
with a Ceylon No Heat sapphire weighing 2.57ct. The rim is engraved with flowery/leafy motifs typical
Category

Early 1900s French Art Nouveau Antique No Heat Sapphire

Materials

Sapphire, Blue Sapphire, 18k Gold, Yellow Gold

Art Deco Sapphire and Diamond Set Gold Ring
Located in Litchfield, CT
carat pastel blue sapphire (no heat) and diamonds, diamonds, diamonds! 4.0 carats of sparkly pave-set
Category

1920s American Art Deco Antique No Heat Sapphire

Materials

White Diamond, Blue Sapphire, 14k Gold, Yellow Gold

BOUCHERON Art Deco Sapphire and Diamond Ring
By Boucheron
Located in Litchfield, CT
cabochon no heat sapphire and 1 carat total weight diamonds, F color and VS clarity Accompanied by GIA
Category

Early 20th Century French Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Antique Victorian 18K Yellow Gold Multicolor Sapphire Bracelet, GIA
Located in Great Neck, NY
of the seven stones are GIA certified natural no heat sapphires. All of the colors vary of different
Category

18th Century Unknown Victorian Antique No Heat Sapphire

Materials

Sapphire, Yellow Gold

Victorian 18 Karat Gold 1.00 Carat Sapphire and Diamond Cluster Ring
Located in Narberth, PA
border. The vivid, no-heat sapphire is prong set and weighs approximately 1.00ctw, displaying incredible
Category

1880s Unknown Victorian Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Sapphire, 18k Gold, Yellow Gold, Gold

Antique No-Heat Ceylon Sapphire Ring GIA
Located in Litchfield, CT
carat No-Heat, Ceylon sapphire surrounded by .30 carats of brilliant white diamonds. Finely fashioned in
Category

1890s American Antique No Heat Sapphire

Materials

Diamond, Sapphire, 18k Gold

Antique Victorian 14K Yellow Gold Old Euro Sapphire Three Stone Ring - GIA
Located in Great Neck, NY
three stone ring is crafted in 14k yellow gold. The center holds a beautiful no heat sapphire that has a
Category

1880s Art Deco Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Gold, 14k Gold, Yellow Gold

Victorian Sapphire Pearl Pendant 1ct Antique Original from 1901 14K Yellow Gold
Located in Dearborn, MI
No Heat Sapphires 14K Yellow Gold 1.00 Carat Sapphire Weight  Circa 1901 The Victorian Era in
Category

Early 1900s Victorian Antique No Heat Sapphire

Materials

Pearl, Sapphire, 14k Gold, Yellow Gold

Art Deco Sapphire Set Gold Ring GIA No Heat
Located in Litchfield, CT
with a lush 4.50 carat emerald-cut sapphire (No heat, Ceylon, GIA Report) in a unique coin-edge mount
Category

1920s American Art Deco Antique No Heat Sapphire

Materials

Sapphire, 18k Gold, Yellow Gold, Gold

Antique Sapphire Diamond Ring No Heat Ceylon GIA
Located in Litchfield, CT
STONES: 3.90-carat No Heat Ceylon sapphire with GIA report and .56 carat total weight of H-G color rose
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, Sapphire, 18k Gold, White Gold, Platinum

Burma No Heat Five Carat Sapphire Diamond Ring
Located in Beverly Hills, CA
Beautiful Burma blue. In a hand crafted platinum ring with carre cut sapphires and diamonds. AGL
Category

Early 20th Century Unknown Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Art Deco GIA 1.53 Carat Old Mine Cut Diamond Sapphire Platinum Toi Et Moi Ring
Located in Beverly Hills, CA
One Art Deco GIA 1.53 Carat Old Mine Cut Diamond Sri Lanka No Heat Sapphire Platinum Toi et Moi
Category

1920s American Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Victorian Natural No Heat Cushion Sapphire Diamond Platinum Necklace
Located in Stamford, CT
3.30cts, natural no heat, rim around Sapphire. AGL certificate #CS50416 15 old European cut diamonds
Category

1890s Victorian Antique No Heat Sapphire

Materials

Blue Sapphire, Diamond, 14k Gold, Platinum, Yellow Gold

Edwardian Sapphire, No Heat, and Diamond Brooch, circa 1910
Located in Idar-Oberstein, DE
An Edwardian sapphire and diamond brooch in platinum and yellow gold, ca. 1910s. The central
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Yellow Gold, Platinum

1920s GIA Certified No Heat Natural Burma Sapphire Platinum Ring
Located in Miami, FL
Showcasing this spectacular rare Burma emerald cut natural corundum blue Sapphire with no heat, AGL
Category

1920s Unknown Antique No Heat Sapphire

Materials

Sapphire

Edwardian 1.59 Carat No Heat Burma Sapphire Platinum Heart Ring
Located in Philadelphia, PA
Centering a square cushion cut Burmese sapphire weighing 1.59 carats total, brilliant medium-dark
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Sapphire, Blue Sapphire, Platinum

Ceylon No Heat Blue Sapphire and Diamond Ear Pendants
Located in New York, NY
platinum and features two pear shape blue sapphire weighing 2.98 CTS and 2.73 CTS and two round sapphire on
Category

Late 19th Century Unknown Contemporary Antique No Heat Sapphire

Materials

White Diamond, Blue Sapphire, Platinum

3 Carat Natural No Heat Cornflower Blue Cushion Kashmir Sapphire
Located in New York, NY
A three-carat, natural, no-heat (untreated), cushion shape sapphire from the original mines in
Category

Late 19th Century Indian Late Victorian Antique No Heat Sapphire

Materials

Sapphire

Edwardian Natural No Heat Burma Blue Sapphire Platinum Diamond Ring
Located in Cape May, NJ
Antique Edwardian Platinum 3.18 Carat Blue Sapphire & Diamond Ring. The ring is in excellent estate
Category

Early 1900s Edwardian Antique No Heat Sapphire

Materials

Blue Sapphire, Diamond, Platinum

Edwardian 1.42 Carats No Heat Ceylon Sapphire Diamond Ring AGL
Located in Philadelphia, PA
Centering rectangular step cut Ceylon sapphire weighing 1.37 carats; bright blue in color with no
Category

1910s Unknown Edwardian Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, 14k Gold, Platinum

GIA Certified 11.46 Carat No Heat Ceylon Sapphire Art Deco Ring
Located in Santa Barbara, CA
. Certified as all natural with no heat treatment, this Sri Lanka (Ceylon) origin gemstone is a sapphire
Category

1920s Art Deco Antique No Heat Sapphire

Materials

Sapphire, Blue Sapphire, Platinum

Edwardian 2.95 Carats Cushion Cut No Heat Cambodian Sapphire Drop Earrings
Located in Philadelphia, PA
Centering cushion cut sapphires weighing approximately 1.75 carats total - transparent medium blue
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Edwardian 12.02 Carats No Heat Ceylon Sapphire Diamond Platinum Statement Ring
Located in Philadelphia, PA
Centering an oval cut Ceylon sapphire weighing 11.02 carats Transparent with uniform cornflower
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Edwardian 5.50 Carat No Heat Color-Change Ceylon Sapphire Diamond Platinum
Located in Philadelphia, PA
gold Featuring a pear cut sapphire weighing approximately 5.20 carats Strongly violetish blue in
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow ...

Superb Art Deco Platinum, Diamond No Heat Natural Sapphire Line Bracelet
Located in Los Angeles, CA
" Non Heat Treated Natural Blue Sapphires of the finest color I have ever seen in a bracelet of this
Category

Early 20th Century American Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Vintage 8.62 Carat No Heat Ceylon Sapphire Diamond Platinum Ring AGL
Located in Philadelphia, PA
Centering a basket set cushion cut Ceylon sapphire weighing 8.12 carats, bright blue in color with
Category

Early 20th Century Unknown Art Deco Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Platinum

AGL Edwardian 2.56 Carats No Heat Burma Sapphire Diamond Platinum Dinner Ring
Located in Philadelphia, PA
Centering a cushion cut sapphire weighing approximately 2.08 carats - transparent medium blue
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

GIA Victorian 2.94 Carats Cushion No-Heat Pink Burma Sapphire Diamond Ring
Located in Philadelphia, PA
Centering a cushion shaped step cut sapphire weighing approximately 2.06 carats total - transparent
Category

1880s Victorian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Pink Sapphire, 14k Gold, Yellow Gold

Art Deco Diamond Natural No Heat Blue Sapphire Platinum Cocktail Ring
Located in Boca Raton, FL
sapphire. The oval shape sapphire is certified by the GIA, and surrounded by 36 old european cut diamonds
Category

Early 20th Century Unknown Art Deco Antique No Heat Sapphire

Materials

White Diamond, Blue Sapphire, Diamond, Platinum

Art Deco French LFG Certificate No Heat Ceylon Sapphire Diamond Platinum Ring
Located in Beverly Hills, CA
One Art Deco French LFG Certificate No Heat Ceylon Sapphire Diamond Platinum Filigree Ring
Category

1920s French Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

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Antique No Heat Sapphire For Sale on 1stDibs

On 1stDibs, you can find the most appropriate antique no heat sapphire for your needs in our varied inventory. Frequently made of Gold, 18k Gold and Platinum, this item was constructed with great care. You can easily find a 44 antique edition and 1 modern creations to choose from as well. If you’re looking for an antique no heat sapphire 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. For this particular accessory, there are many different carat weights to choose from, but 3 Carat and 3.5 Carat versions are of considerable interest. Creating an antique no heat sapphire has been a part of the legacy of many jewelers, but those produced by Tiffany Co., Bulgari and David Gross Group are consistently popular. See these pages for an antique cushion cut iteration of this accessory, while there are also cushion cut cut and emerald cut cut versions available here, too. If you’re browsing our inventory for an antique no heat sapphire, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a Antique No Heat Sapphire?

Prices for an antique no heat sapphire can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $1,631 and can go as high as $298,000, while this accessory, on average, fetches $9,893.

The Legacy of Sapphire in Jewelry Design

On 1stDibs, shop the bright blue gems that star in sapphire rings, sapphire necklaces and other vintage and antique sapphire jewelry

Sapphires — the stone of choice for Napoleon, Princess Diana and Elizabeth Taylor — have been a favorite of aristocrats and the well-to-do since the time of the Ancient Greeks.

Picture a sapphire. If the stone you conjure is a deep cornflower blue, you’re seeing only part of the picture. Although blue Kashmirs are considered the most valuable, sapphires come in every color except red. No matter the hue, this very special gem is rich in history and beloved by royals (FYI, Princess Diana and Kate Middleton share an 11-carat sapphire engagement ring), so September babies are in very noble company.

America’s version of royalty — old money and celebrities — have also shown a predilection for the blue stones. In 1940, John D. Rockefeller Jr. had Cartier mount a 62-carat sapphire he had bought from an Indian maharajah in a brooch for his first wife, Abby Aldrich Rockefeller; in 2001, the piece sold for a then-record of $3,031,000 at Christie’s New York.

The grand dame of jewelry, Elizabeth Taylor had a passion for the gems that her lovers were happy to indulge. Second husband Michael Wilding gave her an engagement ring set with a cabochon sapphire, while Richard Burton famously presented her with a BVLGARI sautoir set with diamonds and sapphires, including at its center a cabochon Burmese weighing 52.72 carats. One of the star lots in the sale of Taylor’s jewels at the Christie’s New York in 2011, it sold for $5,906,500.

You don’t have to have blue blood or a bulging bank account, however, to get an eyeful of this much-coveted gem. A number of outstanding examples reside in public collections.

The Smithsonian Museum of Natural History owns the 423-carat Logan sapphire, a gift from the Guggenheim family, and the Hall sapphire and diamond necklace, designed by Harry Winston and featuring 36 fine, well-matched cushion-cut Sri Lankan sapphires weighing a combined 195 carats. Also in the collection is the Bismarck sapphire necklace, designed by Cartier and sporting a central sapphire weighing 98.6 carats, which Mona Von Bismarck donated to the museum.

Sapphires are composed of corundum. Their color derives from trace elements, such as iron, titanium, chromium, copper or magnesium. When the trace element produces a ruby hue, the stone is called, what else, a ruby. (which is, as mentioned above, why sapphires cannot be red by definition).

The allure of large gemstones endures throughout the periods characterized as vintage, and sapphire features frequently in vintage engagement rings. (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.)  

Find an exquisite collection of vintage and antique sapphire jewelry on 1stDibs.

Questions About Antique No Heat Sapphire
  • 1stDibs ExpertApril 5, 2022
    A no-heat sapphire is a sapphire gemstone in its natural state. It differs from sapphires that undergo heat treatment to enhance their surface. Generally, no-heat sapphires are smoother, while heated sapphires are harder and more lustrous. Shop a range of sapphire gemstone jewelry on 1stDibs.
  • 1stDibs ExpertMarch 22, 2022
    Yes, sapphires conduct heat. In fact, a real one won't melt until it reaches a temperature of 3,711 degrees F. As a result, one way that experts test sapphires to determine if they are real is to heat them to high temperatures. Find a collection of sapphire gemstone jewelry on 1stDibs.