GIA CEYLON Blue Sapphire & Old Minor 3 CT Diamond Cocktail Ring Platinum Estate
Located in New York, NY
Approximately 2.5 Carat Ceylon Blue Sapphire GIA CERTIFIED & Diamond Platinum Cocktail Ring 2.5 Carat of blue Sapphire. This is an estate piece and stone was not taken out to weig...
Diamond, Blue Sapphire, Platinum
Oval Sapphires South Sea Pearls Dangle Drop Earrings 3 Carats 18K White Gold
By Harbor Diamonds
Located in New York, NY
18K White gold drop earrings featuring 6 oval Sapphires weighing 3.00 carats and two South Sea Pearls measuring 11-12 mm.
Diamond, Blue Sapphire, South Sea Pearl, Sapphire, 18k Gold, White Gold
14K White Gold Oval Blue Sapphire and 3/4 Cttw Diamond Fashion Pendant Necklace
Located in New York, NY
Step into a world of elegance with this exquisite pendant necklace, where a mesmerizing 7x5mm natural blue sapphire takes center stage, evoking the deep hues of an endless ocean.
White Diamond, Sapphire, Diamond, Blue Sapphire, 14k Gold, White Gold
French 3 carat sapphire diamond 18k white gold cluster ring
Located in Beverly Hills, CA
This vintage French ring from the 1980’s features a striking 3 carat oval cut dark blue sapphire, set in 18k white gold and hallmarked with the French eagle head and maker’s marks.
Diamond, Sapphire, Gold, 18k Gold, White Gold
Cellini 18 Karat Gold, 149.5 Carat Rainbow Sapphire and Diamond 3-Row Necklace
By Cellini
Located in New York, NY
Make a statement wearing this three-row rainbow sapphire necklace. Composed of 149.5 carats of multi-color oval-cut sapphires and accented with 2.07 carats of round brilliant diamond...
Diamond, Multi-gemstone, Sapphire, Blue Sapphire, Pink Sapphire, Yellow ...
Certified 5.76 Carat Cushion Cut Sapphire Diamond 3 Stone Ring in Platinum
Located in NEW YORK, NY
A stunning ring showcasing a rich intense Certified Cushion Cut Ceylon Blue Sapphire weighing 5.76 carats surrounded by a row of diamonds. Flanking the center stone are two half trap...
Diamond, Blue Sapphire, Platinum
GIA Certified Oval Cut Blue Sapphire and Trillion Cut Diamond 3 Stone 18k Ring
By Gad & Co.
Located in Miami, FL
4.40 Carat GIA certified Sri Lanka origin Blue Sapphire with trillion cut diamond side stones in 18 karat solid yellow gold.
Diamond, Blue Sapphire, 18k Gold, Yellow Gold
18K Yellow Gold 3/8 Cttw Diamond & 5 4/5 Cttw Blue Sapphire Bumblebee Brooch Pin
Located in New York, NY
Product Features: Diamond Type: Natural White Diamonds Diamond Count: 14 Round-Cut Diamonds Diamond Color: F-G Diamond Clarity: VS2-SI1 Diamond Weight: 0.44 cttw Diamond Setting Typ...
White Diamond, Sapphire, Diamond, Blue Sapphire, 18k Gold, Yellow Gold
3 Ct Blue Sapphire & 1.5 Ct Diamond Flower Ring in 18 Kt Two Tone Gold Size7
Located in New York, NY
3 Ct Blue Sapphire & 1.5 Ct Diamond Cocktail Ring in 18 Kt Two Tone Gold Size 7 Beautiful Flower Ring Two tone ring as the band is made out of Yellow gold and top of the ring ...
Diamond, Blue Sapphire, 18k Gold, White Gold
French 1970s 3 Carat No Heat Sapphire Diamonds 18 Karat White Gold Daisy Ring
Located in Poitiers, FR
Total weight of the sapphire : 3 carats approximately. Certified by French Laboratory : Natural - No Heat - No treated, from the mines of Ceylon - Sri Lanka.
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, White Gold
11 Ct Fine Multi Sapphire & 3 Ct Diamond Cocktail Flower Ring in 18 Kt Gold 6.5
Located in New York, NY
11 Ct Fine Multi Sapphire & 3 Ct Diamond Cocktail Flower Ring in 18 Kt Gold 6.5 18 Karat yellow Gold 10.5 Grams Approximately 11 Ct Natural Sapphire , Pink, Purple , Blue & Ora...
Diamond, Sapphire, Blue Sapphire, Rose Gold, 18k Gold
18K White Gold 3/8 Ct Diamond with Sapphire & Tsavorite Gemstone Tennis Bracelet
Located in New York, NY
This 18k white gold tennis bracelet is a stunning piece that is perfect to pair with any outfit choice. An array of colorful diamonds and gemstones enhance the look and give it a uni...
Diamond, White Diamond, Brown Diamond, Blue Sapphire, Tsavorite, 18k Gol...
$1,342Sale Price / item|25% Off
Bochic Capri Vintage 20ct Blue Sapphire & Ruby Earrings in 18K Gold
By Bochic
Located in New York, NY
Bochic “Capri” Vintage Blue Sapphire, Ruby & Rose Cut Sapphire Earrings Set In 18K Gold & Silver From the “Capri” collection Natural Blue Sapphire 3 carats Round shapes ...
Ruby, Sapphire, Blue Sapphire, 18k Gold, Silver
Multicolored Sapphires Ring Green Orange Blue Sterling Silver
Located in Bonita Springs, FL
It comes with the Gemological Appraisal by GIA GG/AJP All gemstones are natural 3 Green Sapphires = 0.36 Carats 3 Orange Sapphires = 0.36 Carats 3 Blue Sapphires = 0.36 Carats Metal:...
Sapphire, Rhodium, Silver, Silver Plate, Sterling Silver
Multicolored Sapphires Ring Green Orange Blue Sterling Silver
Located in Bonita Springs, FL
It comes with the Gemological Appraisal by GIA GG/AJP All gemstones are natural 3 Green Sapphires = 0.36 Carats 3 Orange Sapphires = 0.36 Carats 3 Blue Sapphires = 0.36 Carats Metal:...
Sapphire, Rhodium, Silver, Silver Plate, Sterling Silver
2.5ct Blue Sapphire & 0.6ct Diamond Cocktail Ring in 18 Karat White Gold Estate
Located in New York, NY
Approximately 2.5 Ct Blue Sapphire & 0.6 Ct Diamond Cocktail Ring in 18 Karat White Gold Estate 2.5 Carat of 3 Oval blue Sapphire.
Diamond, Blue Sapphire, 18k Gold, White Gold
Multicolored Sapphires Ring Green Orange Blue Sterling Silver
Located in Bonita Springs, FL
It comes with the Gemological Appraisal by GIA GG/AJP All gemstones are natural 3 Green Sapphires = 0.36 Carats 3 Orange Sapphires = 0.36 Carats 3 Blue Sapphires = 0.36 Carats Metal:...
Sapphire, Rhodium, Silver, Silver Plate, Sterling Silver
$841Sale Price|20% Off
14KT White Gold Sterling Blue Sapphire and White Diamond Butterfly Necklace
Located in Antwerp, BE
The wings are adorned with numerous small, pavé-set white stones , while the body features distinctive blue sapphire stones , creating a sophisticated contrast Material : 14KT Whit...
Diamond, Blue Sapphire, 14k Gold, White Gold
$841Sale Price|20% Off
14KT Yellow Gold Sterling Blue Sapphire and White Diamond Butterfly Necklace
Located in Antwerp, BE
The wings are adorned with numerous small, pavé-set white stones while the body features distinctive blue sapphire stones , creating a sophisticated contrast Material : 14KT Yello...
Diamond, Blue Sapphire, 14k Gold, Yellow Gold
$499Sale Price|23% Off
Multicolored Sapphires Ring Green Orange Blue Sterling Silver
Located in Bonita Springs, FL
It comes with the Gemological Appraisal by GIA GG/AJP All gemstones are natural 3 Green Sapphires = 0.36 Carats 3 Orange Sapphires = 0.36 Carats 3 Blue Sapphires = 0.36 Carats Metal:...
Sapphire, Rhodium, Silver, Silver Plate, Sterling Silver
Multicolored Sapphires Ring Green Orange Blue Sterling Silver
Located in Bonita Springs, FL
It comes with the Gemological Appraisal by GIA GG/AJP All gemstones are natural 3 Green Sapphires = 0.36 Carats 3 Orange Sapphires = 0.36 Carats 3 Blue Sapphires = 0.36 Carats Metal:...
Sapphire, Rhodium, Silver, Silver Plate, Sterling Silver
Multicolored Sapphires Ring Green Orange Blue Sterling Silver
Located in Bonita Springs, FL
It comes with the Gemological Appraisal by GIA GG/AJP All gemstones are natural 3 Green Sapphires = 0.36 Carats 3 Orange Sapphires = 0.36 Carats 3 Blue Sapphires = 0.36 Carats Metal:...
Sapphire, Rhodium, Silver, Silver Plate, Sterling Silver
$1,182Sale Price|40% Off
Bochic “Orient” Vintage Tsavorite & Blue Sapphire Earrings 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Vintage Tsavorite & Blue Sapphire Earrings Set In 18K Gold & Silver Natural Green Tsavorite - 3 carat Natural Blue sapphire - 0.40 carat The earrings from the ...
Blue Sapphire, Tsavorite, 18k Gold, Silver
$1,182Sale Price|40% Off
Bochic “Orient” Vintage Tsavorite & Blue Sapphire Earrings - 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Vintage Tsavorite & Blue Sapphire Earrings Set In 18K Gold & Silver Natural Green Tsavorite - 3 carat Natural Blue sapphire - 0.40 carat The earrings from the ...
Blue Sapphire, Tsavorite, 18k Gold, Silver
Classic Baguette-Cut Blue Sapphire with Round-Cut Diamond 14k White Gold Ring
Located in New York, NY
The 14K White Gold jewelry boasts with Baguette-cut 3 pcs 0.41 carat Blue Sapphire and Natural Round-cut white Diamond (4 Pcs) 0.06 Carat accent stones for a lovely design.
Diamond, Blue Sapphire, 14k Gold, White Gold
Bespoke Halo Mount for 3-5 Carat Yellow White Diamond Oval Shape Platinum Ring
By Hasbani Diamonds
Located in London, GB
Double Halo Diamond Engagement Ring Setting Platinum Yellow Diamond Halo for 3–5 Carat Oval Center A stunning double halo diamond engagement ring setting, crafted in platinum, desig...
Amethyst, Aquamarine, Citrine, Diamond, White Diamond, Pink Diamond, Eme...
Bespoke 3 Carat Round Diamond 18 Kt White Gold Cluster Daisy Pendant Necklace
By Hasbani Diamonds
Located in London, GB
This Beautiful 3.00 Carat Flower design Cluster Diamond pendant features 7 beutiful round brilliant cut diamonds color G/H clarity SI1, white eye clean, and lustrous diamonds. A stun...
Diamond, White Diamond, Emerald, Ruby, Blue Sapphire, Gold, 18k Gold, Wh...
Victorian Natural 3 CTW Multi Gemstone/Diamond Serpentine Ring Size 7 in 18k/925
Located in New York, NY
Discover the allure of the Victorian Multi Gemstone and Diamond Serpentine Band Ring — a stackable masterpiece in 18k Gold and Sterling silver that seamlessly blends historical charm...
Diamond, Emerald, Blue Sapphire, Tsavorite, 18k Gold, Rhodium, Sterling ...
Diamond, Tsavorite and Multicolor Sapphire Tulip Brooch in 18K Gold, 2008
Located in BILBAO, ES
The piece features 53 tsavorites totaling 2.33 carats, 145 diamonds totaling approximately 1.70 carats, 50 pink sapphires totaling 2.41 carats, 50 yellow sapphires totaling approxima...
Diamond, Blue Sapphire, Pink Sapphire, Yellow Sapphire, Tsavorite, Sapph...
Stenzhorn 18 Karat White Gold Diamond and Pastel Sapphire Parrot Brooch
By Stenzhorn
Located in New York, NY
The parrot measures 3" long. Diamond weight 1.75 carats Blue Sapphires weight 5.40 carats Pink sapphires weight 2.45 carats Ruby weight .02 carats
Diamond, Onyx, Ruby, Sapphire, Blue Sapphire, Pink Sapphire, White Gold
Bochic “Capri” Vintage Amethyst & Multi Color Sapphires Cuff Set In 18K & Silver
By Bochic
Located in New York, NY
At its center, a richly hued purple amethyst (3 carats) anchors the design, surrounded by a vibrant arrangement of natural gemstones including: Blue Sapphire — 5 Carats Yellow Sapph...
Amethyst, Peridot, Sapphire, Blue Sapphire, Yellow Sapphire, 18k Gold, S...
$1,808Sale Price|20% Off
Bochic “Capri” Vintage Ruby & Multi Color Gem & Sapphire Bangle Set In 18K Gold
By Bochic
Located in New York, NY
Bochic “Capri” Vintage Ruby & Multi Color Gem & Sapphire Bangle Set In 18K Gold & Silver open and close hinge and safety locks Natural Ruby - 7 Carats Natural Blue Top...
Ruby, Sapphire, Blue Sapphire, Yellow Sapphire, Blue Topaz, 18k Gold, Si...
Bochic “Orient” Vintage Sapphire, Diamond & South Sea Pearl Bangle Set 18K & Sil
By Bochic
Located in New York, NY
Bochic “Orient” Vintage Multi Color Sapphire, Diamond & South Sea Pearl Bangle Set White 18K & Silver Bochic “Orient” Multi Color Natural Sapphire & South Sea Tahiti Pearl bangle ...
Diamond, South Sea Pearl, Sapphire, Blue Sapphire, Pink Sapphire, Yellow...
$1,477Sale Price|25% Off
Bochic “Orient” Vintage Sapphire, Topaz & Pearl Bangle Set White 18K & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Sapphire, Topaz & South Sea Pearl Bangle Set White 18K & Silver Bochic “Orient” Multi Color Natural Sapphire & South Sea Tahiti Pearl bangle Natural S...
South Sea Pearl, Sapphire, Blue Sapphire, Pink Sapphire, Yellow Sapphire...
$1,832Sale Price|20% Off
Bochic “Capri” Vintage Ruby & Multi Color Sapphire Bangle Set 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Capri” Vintage Ruby & Multi Color Gem & Sapphire Bangle Set In 18K Gold & Silver open and close hinge and safety locks Natural Red Ruby - 5 Carats Natural Whi...
Ruby, Sapphire, Blue Sapphire, Yellow Sapphire, Topaz, 18k Gold, Silver
$1,336Sale Price|20% Off
Bochic “Capri” Ruby & Multi Color Gem & Sapphire Bangle Set In 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Capri” Ruby & Multi Color Gem & Sapphire Bangle Set In 18K Gold & Silver open and close hinge and safety locks Natural Red Ruby - 5 Carats Natural White Topaz...
Ruby, Sapphire, Blue Sapphire, Yellow Sapphire, Topaz, 18k Gold, Gold Pl...
Amwaj White 18 Karat Gold Choker with Diamonds and Sapphire
By Amwaj Jewellery
Located in Abu Dhabi, Abu Dhabi
This amazing choker with white emerald cut diamonds each 1/3 carat and blue sapphire is designed to accent the neckline with feminine and delicate touch.
White Diamond, Blue Sapphire, 18k Gold
Kashmir sapphire diamond ring engagement ring 18KT gold
Located in Boca Raton, FL
Stunning Kashmir sapphire ring made with 3 carats sapphire cornflower blue color and fine diamonds totalling 0.80 carats in 18KT gold.
Diamond, Sapphire, Gold, 18k Gold
Multi-color Sapphire Diamond Butterfly Brooch Pin in 14K Gold
Located in beverly hills, CA
Metal: 14K White & Yellow Gold SAPPHIRES: WINGS: 188 Sapphires = 5.5 Carats Yellow Sapphires round 1.3 mm = 3.4 carats Pink Sapphires Oval 4 mm x 3 mm = 0.90 carat Blue Sapphires ...
Diamond, Sapphire, 14k Gold, White Gold, Yellow Gold
$1,134Sale Price / set|40% Off
Bochic “Orient” Vintage Sapphire & Pearl Earrings & Bangle 18K & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Vintage Sapphire, Coral & South Sea Pearl Earrings & Bangle Set 18K & Silver Bochic “Orient” Multi Color Natural Sapphire & South Sea Pearl Earrings ands bangle Na...
South Sea Pearl, Sapphire, Pearl, Silver, 18k Gold
Multi-color Sapphire and Diamond Butterfly Brooch Pin in 14K Gold
Located in beverly hills, CA
Metal: 14K Yellow Gold Gemstones: Pink Sapphire round 1.3 mm = 3.4 carats Purple Sapphires Oval 4 mm x 3 mm = 0.30 carat Blue Sapphires Oval 4 mm x 3 mm = 0.60 carat Green Sapphir...
Diamond, Ruby, Sapphire, 14k Gold, Yellow Gold
Bochic “Orient” Vintage Sapphire, Coral & South Sea Pearl Bangle - 18K & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Vintage Sapphire, Coral & South Sea Pearl Bangle Set 18K & Silver Natural Sri Lankan round brilliant sapphires - 3 carats Pink, Blue, Rose.
Coral, South Sea Pearl, Sapphire, 18k Gold, Silver
$1,167Sale Price|40% Off
Bochic “Capri” Vintage Ruby & Multi Color Sapphire Bangle - 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Capri” Vintage Ruby & Multi Color Sapphire Bangle Set In 18K Gold & Silver open and close hinge and safety locks Natural Red Ruby - 3 Carats Natural Blue Sapphire - 4 Car...
Ruby, Sapphire, Topaz, 18k Gold, Silver
$936Sale Price|35% Off
Bochic “Orient” Ruby, Multi Sapphires & Tsavorite Brooch Set 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Ruby, Multi Sapphires & Tsavorite Brooch Set 18K Gold & Silver Can be worn as a brooch and a pendant Natural Red Ruby - 24 carat Multi color Natural Sap...
Ruby, Sapphire, Tsavorite, 18k Gold, Silver
$1,252Sale Price|25% Off
Bochic “Capri” Ruby & Multi Color Sapphire Bangle Set In 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Capri” Ruby & Multi Color Sapphire Bangle Set In 18K Gold & Silver open and close hinge and safety locks Natural Red Ruby - 3 Carats Natural Blue Sapphire - 4 Car...
Ruby, Sapphire, 18k Gold, Silver
$1,383Sale Price|25% Off
Bochic “Capri” Ruby & Multi Color Sapphire Bangle Set In 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Capri” Ruby & Multi Color Sapphire Bangle Set In 18K Gold & Silver open and close hinge and safety locks Natural Red Ruby - 3 Carats Natural Blue Sapphire - 4 Car...
Ruby, Sapphire, Topaz, 18k Gold, Silver
$880Sale Price|35% Off
Bochic “Orient” Neoclassical Bull, Ruby & Sapphire Ring Set 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Neoclassical Bull, Ruby & Sapphire Ring Set 18K Gold & Silver Fantastic Oriental-style ring Iconic Neoclassical Collection Natural Dark Blue Sapphire - 3 carats N...
Emerald, Ruby, Sapphire, 18k Gold, Gold Plate, Silver
Bochic “Capri” Sapphire, Vintage Jade & Pearls Necklace Set In 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Capri” Vintage Jade, Blue Sapphire & Pearls Necklace Set In 18K Gold & Silver Natural Blue Sapphire - 3 carats Natural Jade White Fresh Water Pearls White South Sea Pear...
Jade, Pearl, South Sea Pearl, Sapphire, 18k Gold, Silver
$1,576Sale Price|20% Off
Bochic “Orient” Ruby & Multi Sapphire Serpent Earrings Set In 18K Gold & Silver
By Bochic
Located in New York, NY
Bochic “Orient” Ruby & Multi Sapphire Serpent Earrings Set In 18K Gold & Silver Natural Rubies - 3 carat Natural Blue sapphire - 2.40 carat The earrings from the "Orien...
Ruby, Sapphire, 18k Gold, Silver
Antique 1880s Russian Sapphire Rose Cut Diamonds Gold Bracelet
Located in Cairo, EG
Antique imperial russian era bracelet made in st moscow 1880s centered with 3 carats natural blue sapphires and 2 carats of rose cut diamonds with total 14k gold weight 19 grams hall...
3 Carat Sapphire and 2 Carat Diamond Bracelet in 18 Karat Yellow Gold 116 Gm
Located in New York, NY
This exceptional bracelet has 26 round blue sapphire stone . Weight of the Sapphire is approximately 3 carats.
Diamond, Blue Sapphire, Sapphire, 18k Gold, Yellow Gold
18K White Gold 3/8 Ct Diamond with Sapphire & Tsavorite Gemstone Tennis Bracelet
Located in New York, NY
This 18k white gold tennis bracelet is a stunning piece that is perfect to pair with any outfit choice. An array of colorful diamonds and gemstones enhance the look and give it a uni...
Brown Diamond, Tsavorite, Blue Sapphire, White Diamond, Diamond, White G...
3 Carat Blue Sapphires Necklace Handmade in 18 Karat white Gold
By FERRUCCI
Located in New York, NY
Entirely made in 18k white gold with an 18k white gold chain measuring 20 inches in lenght, with the option of closing it at 18 inches for a double style wear. The total Sapphires ca...
Blue Sapphire, 18k Gold
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 rings, vintage engagement rings or Art Deco engagement rings.)
Find an exquisite collection of vintage and antique sapphire jewelry on 1stDibs.