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Untreated Sapphire

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Unique Untreated 1.08ct Parti Colour Australia Sapphire Blue Green Oval Cut
By Gems and Jewels UK
Located in Birmingham, GB
Untreated Greenish Yellow Blue Parti-Colour/Bi colour Australian Sapphire Gemstone. 1.08 Carat
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Yellow Sapphire, Green Sapphire

Untreated Green Sapphire 0.71ct Oval Cut Loose Rare Australian Gem
By Gems and Jewels UK
Located in Birmingham, GB
Natural Untreated Green Sapphire Gemstone. 0.71 carat stone with a beautiful green colour and good
Category

21st Century and Contemporary Loose Gemstones

Materials

Green Sapphire

Rare Untreated Colour Change Sapphire 1.21ct Pink Purple Triangle Trillion Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare Natural Untreated Colour Change Sapphire. 1.21 Carat with an excellent triangle trillion cut
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Purple Sapphire, Pink Sapphire

Australian 0.71ct Untreated Blue Green Bi Colour Sapphire Emerald Octagon Cut
By Gems and Jewels UK
Located in Birmingham, GB
Totally untreated and unheated, very rare for natural sapphires.
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Green Sapphire, Blue Sapphire

GIA Certified 1.40ct Untreated Teal Green Blue Sapphire Diamond Platinum Pendant
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified Untreated Green Blue Sapphire & Diamond Platinum Pendant Necklace. Untreated 1.40
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Diamond, Green Sapphire, Platinum

Vivid Yellow Untreated Australian Sapphire 0.49ct Pear Cut Loose Gem
Located in Birmingham, GB
Vivid Yellow Untreated Australian Sapphire 0.49ct Pear Cut 6.4 x 4.3mm Loose Gem Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

Untreated Deep Pink Purple Colour Change Sapphire Trillion Triangle Certified
Located in Birmingham, GB
Untreated Deep Pink Purple Colour Change Sapphire Trillion Triangle Certified Rare Natural
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

FINE 1.12ct Green UNTREATED Australian Sapphire Octagon Cut 6.3x4.2mm Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Fine Natural Untreated Australian Green Sapphire Gemstone. 1.12 Carat with a beautiful yellow
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Green Sapphire

Australian Sapphire 0.64ct Untreated Teal Green Blue Unheated Round Cut
Located in Birmingham, GB
Australian Sapphire 0.64ct Untreated Teal Green Blue Unheated Round Cut 4.5mm Natural Green Blue
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

GIA Certified 1.50 Carat Untreated Violet Blue Sapphire Diamond Ring
Located in Birmingham, GB
Stunning deep violetish blue sapphire set in a fine 18k white gold ring with two white diamond
Category

21st Century and Contemporary Three-Stone Rings

Materials

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

Fine 1.02ct Green Untreated Australian Sapphire Octagon Cut Loose Gem
Located in Birmingham, GB
Fine 1.02ct Green Untreated Australian Sapphire Octagon Cut 6.4x4.8mm Loose Gem Fine Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

IGI Certified 1.15ct Untreated Green Blue Sapphire Oval Cut Unheated Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
Natural untreated blue sapphire. 0.76 carat stone, with an excellent oval cut. Fully certified by
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Blue Sapphire

Fine 1.12ct Green Untreated Australian Sapphire Octagon Cut Loose Gem
Located in Birmingham, GB
Fine 1.12ct Green Untreated Australian Sapphire Octagon Cut 6.3 x 4.2mm Loose Gem Fine Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

GIA Certified 1.04ct Untreated Vivid Yellow Sapphire Round Diamond Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified Untreated Yellow Sapphire Gemstone. 1.04 Carat unheated sapphire with a beautiful
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Yellow Sapphire

GIA Certified 1.46Ct Untreated Lagoon Blue Green Sapphire Cushion Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified 1.46Ct Untreated 'Lagoon' Blue Green Sapphire Cushion Cut Gem Natural GIA Certified
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire, Green Sapphire

1.01ct Green Blue Teal Untreated Australian Sapphire 18k Yellow Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Deep Green Blue Untreated Australian Sapphire 18k Yellow Gold Solitaire Pendant. 1.01 Carat
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Green Sapphire, Gold, 18k Gold, Yellow Gold

Fine Australian 0.67ct Untreated Vivid Yellow Sapphire Emerald Cut Gem
Located in Birmingham, GB
Fine Australian 0.67ct Untreated Vivid Yellow Sapphire Emerald Cut Gem 5.3x3.6mm Fine Natural
Category

21st Century and Contemporary More Jewelry

Materials

Emerald, Yellow Sapphire

Australian 1.29ct Untreated Deep Blue Green Bi Colour Sapphire Fancy Cut
By Gems and Jewels UK
Located in Birmingham, GB
polish. Totally untreated and unheated, very rare for natural sapphires. Photographs taken at 20x zoom
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire

IGI Certified 1.41ct Untreated Vivid Green Sapphire 18k White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Fine IGI Certified Untreated Vivid Green Sapphire 18k White Gold Pendant. 1.41 Carat sapphire with
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Green Sapphire, Yellow Sapphire, Gold, 18k Gold, White Gold

GIA Certified 1.45ct Untreated Vivid Green Thai Sapphire Asscher Emerald Octagon
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified 1.45ct Untreated Vivid Green Thai Sapphire Asscher Emerald Octagon GIA Certified
Category

20th Century More Jewelry

Materials

Sapphire, Emerald, Green Sapphire

GRA Certified 1.21ct Vivid Green Sapphire Untreated Oval Cut Rare Gem
Located in Birmingham, GB
GRA Certified 1.21ct Vivid Green Sapphire Untreated Oval Cut Rare Gem 6.6x5.6mm GRA Certified
Category

21st Century and Contemporary British More Jewelry

Materials

Sapphire, Green Sapphire

SSEF Switzerland Unheated Untreated 7 Carat Ceylon Blue Sapphire Ring
By Antinori Fine Jewels
Located in Chicago, IL
Behold, a magnificent natural Blue Sapphire hailing from the renowned mines of Ceylon (Sri Lanka
Category

2010s Unknown Contemporary Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

IGI Certified Untreated Pink Sapphire Oval Cut Gold Solitaire Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
Natural untreated pink sapphire solitaire pendant. Beautiful oval cut Sapphire. Set in a fine 14k
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Pink Sapphire, Gold, Yellow Gold

IGI Certified Untreated 1.61ct Pink Purple Sapphire Solitaire Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
Natural untreated purplish pink sapphire solitaire pendant. Beautiful oval cut Sapphire. Set in a
Category

2010s Pendant Necklaces

Materials

Sapphire, Gold, 14k Gold, Yellow Gold

Untreated 1.00 Carat Ceylon Sapphire Pendant 18 Karat Gold IGI Certified
Located in Birmingham, GB
fine 18k yellow gold pendant setting. Untreated and unheated. Very rare for Sapphires. Particularly
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Pink Sapphire, 18k Gold, Yellow Gold

GIA Certified 1.37ct Bi Colour Sapphire Green Yellow Untreated Emerald Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare Untreated Bi Colour Sapphire Gemstone. 1.37 Carat unheated sapphire with a rare bi colour
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Yellow Sapphire, Green Sapphire

GIA Certified 1.79ct Bi Colour Sapphire Blue Yellow Untreated Emerald Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare Untreated Bi Colour Sapphire Gemstone. 1.79 Carat unheated sapphire with a rare bi colour
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Blue Sapphire, Yellow Sapphire, Green Sapphire

GIA Certified 2.51ct Untreated Blue Green Sapphire Pear Cut Unheated Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
Fine Untreated Greenish Blue Sapphire Gemstone. Fine quality unheated sapphire with a beautiful
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Blue Sapphire, Green Sapphire

Rare 2.41ct GIA Certified Unique Parti Colour Untreated Thai Sapphire Heart Cut
By Gems and Jewels UK
Located in Birmingham, GB
Unique Untreated Thai Parti Colour Sapphire Gemstone. 2.41 Carat unheated sapphire with a rare
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Yellow Sapphire, Green Sapphire

GIA Certified Colour Change Sapphire 1.18ct Untreated Oval Cut Unheated Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare Untreated Colour Change Sapphire Gemstone. 1.18 Carat unheated sapphire with a rare colour
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Pink Sapphire, Purple Sapphire

GIA Certified Colour Change Sapphire 0.76ct Untreated Round Cut Unheated Rare
By Gems and Jewels UK
Located in Birmingham, GB
Rare Untreated Colour Change Sapphire Gemstone. 0.76 Carat unheated sapphire with a rare colour
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

GIA Certified Colour Change Sapphire 1.01ct Untreated Oval Cut Unheated Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare Untreated Colour Change Sapphire Gemstone. 1.01 Carat unheated sapphire with a rare colour
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Pink Sapphire, Purple Sapphire

10.16 Carat AGL Certified Untreated Ceylon Sapphire Diamond Platinum Ring
Located in Bay Harbor Islands, FL
AGL certified no heat Ceylon sapphire weighing 10.16 carats, with round diamonds on the bezel and
Category

2010s American More Rings

Materials

Diamond, Sapphire, Platinum

1.23ct GIA Certified Ceylon Sapphire Yellow Untreated 18k White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Natural GIA Certified Untreated Yellow Ceylon Sapphire 18k White Gold Pendant Necklace. 1.23 Carat
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Yellow Sapphire, Gold, 18k Gold, White Gold

GIA Certified 1.09ct Untreated Deep Green Blue Sapphire Pear Cut Unheated Gem
By Gems and Jewels UK
Located in Birmingham, GB
untreated. Very rare for natural sapphires.
1.09 Carat with very good clarity, a very clean stone with only
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Green Sapphire

2.52ct GIA Certified Untreated Ceylon Blue Sapphire Diamond White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified Untreated Vivid Blue Ceylon Sapphire & Diamond 18k White Gold Pendant Necklace. A
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

GIA Certified Untreated 2.13 Carat Ceylon Yellow Sapphire White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Natural bright yellow untreated Ceylon sapphire white gold pendant. 2.13 Carat pear cut Sapphire
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Yellow Sapphire, Gold, 14k Gold, White Gold

GIA Certified 0.65 Carat Untreated Ceylon Blue Sapphire Gold Solitaire Ring
By Gems and Jewels UK
Located in Birmingham, GB
Beautiful blue Ceylon sapphire set in a 14k white gold ring setting. 0.65 carat stone with a
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Blue Sapphire, Gold, 14k Gold, White Gold

IGI Certified Untreated 1.04ct Pink Purple Sapphire White Gold Solitaire Pendant
By Gems and Jewels UK
Located in Birmingham, GB
Natural deep Purple Sapphire pendant. Beautiful round cut purple sapphire, set in a 14k white gold
Category

21st Century and Contemporary Pendant Necklaces

Materials

Sapphire, Pink Sapphire, Gold, 14k Gold, White Gold

IGI Certified Untreated Deep Green Blue Sapphire Emerald Cut 1.21ct Blister Gem
By Gems and Jewels UK
Located in Birmingham, GB
Natural untreated green blue loose sapphire in IGI Blister. 1.21 carat stone, with an excellent
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Blue Sapphire, Green Sapphire

GIA Certified Untreated 1.21 Carat Light Blue Sapphire Pear Cut Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Natural untreated light blue Sapphire. 1.21 carat stone with a good pear cut. Fully certified by
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire

GIA Certified 3.53ct Untreated Deep Green Blue Sapphire Diamond Cluster Pendant
By Gems and Jewels UK
Located in Birmingham, GB
GIA confirming the sapphire as untreated, very rare for natural sapphires. The centre stone is
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

Untreated Green Blue Colour Change Sapphire 1.22ct Pear Teardrop IGI Certified
Located in Birmingham, GB
Untreated Green Blue Colour Change Sapphire 1.22ct Pear Teardrop IGI Certified Rare Natural Colour
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

Untreated 0.90ct Parti Colour Australia Sapphire Blue Green Pear Cut Gemstone
Located in Birmingham, GB
Untreated 0.90ct Parti Colour Australia Sapphire Blue Green Pear Cut Gemstone Untreated Greenish
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

1.30 Carat Untreated Ceylon Pink Sapphire Diamond Cluster Pendant IGI Certified
Located in Birmingham, GB
sapphires such as the one you see here. Also totally untreated and unheated. Very rare for Sapphires
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

Fine 0.80ct Parti Colour Sapphire Australian Untreated Green Yellow Round 5mm
Located in Birmingham, GB
Fine 0.80ct Parti Colour Sapphire Australian Untreated Green Yellow Round 5mm Rare Green Yellowish
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

Untreated Parti Colour Australia Sapphire 0.72ct Blue Green Yellow Oval Cut
Located in Birmingham, GB
Untreated Parti Colour Australia Sapphire 0.72ct Blue Green Yellow Oval Cut 6x4 Untreated Greenish
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

Unique Untreated 1.08ct Parti Colour Australia Sapphire Blue Green Oval Cut
Located in Birmingham, GB
Unique Untreated 1.08ct Parti Colour Australia Sapphire Blue Green Oval Cut Untreated Greenish
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

Parti Colour Sapphire 1.98ct Untreated Green Blue Yellow Emerald Cut Certified
Located in Birmingham, GB
Parti Colour Sapphire 1.98ct Untreated Green Blue Yellow Emerald Cut Certified Rare Natural
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

IGI Certified Ceylon Yellow Sapphire Untreated 1.14ct Rare Pear Teardrop Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
. This stone is totally untreated and unheated which is very rare for sapphires. Confirmed as untreated
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Yellow Sapphire

Australian Untreated Deep Green Blue Teal Sapphire Heart Cut IGI Certified
Located in Birmingham, GB
Australian Untreated Deep Green Blue Teal Sapphire Heart Cut IGI Certified Deep Green Blue ‘Teal
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

GIA Certified Untreated Bi Colour Australian Sapphire 18k White Gold Ring ITSIT
Located in Birmingham, GB
ITSIT Designed Natural Parti Colour Untreated Australian Sapphire 18k White Gold Three Stone Ring
Category

21st Century and Contemporary Three-Stone Rings

Materials

Sapphire, Blue Sapphire, Yellow Sapphire, Green Sapphire, Gold, 18k Gold...

2.30ct GIA Certified Untreated Teal Blue Sapphire Diamond 18k White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified Untreated Green Blue Teal Sapphire & Diamond White Gold Pendant Necklace. Untreated
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Sapphire, Blue Sapphire, Green Sapphire, 18k Gold, White Gold

2.30ct GIA Certified Untreated Teal Blue Sapphire Diamond 18k White Gold Pendant
By Gems and Jewels UK
Located in Birmingham, GB
GIA Certified Untreated Green Blue Teal Sapphire & Diamond White Gold Pendant Necklace. Untreated
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Sapphire, Blue Sapphire, Green Sapphire, 18k Gold, White Gold

IGI Certified Untreated Deep Blue Sapphire 1.01 Carat Pear Teardrop Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
untreated and unheated, very rare for sapphires. Some inclusions visible in the stone (as shown in pictures
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Blue Sapphire

2.02ct GIA Certified Untreated Bi Colour Sapphire 18k White Gold Signet Ring
Located in Birmingham, GB
ITSIT Designed Natural Bi Colour Untreated Australian Sapphire 18k White Gold Solitaire Signet
Category

21st Century and Contemporary Solitaire Rings

Materials

Sapphire, Blue Sapphire, Yellow Sapphire, Green Sapphire, Gold, 18k Gold...

9.53 Carat Lavender Chalcedony Oval Cabochon Yellow Gold Ring, Lola Brooks, 2022
Located in Dallas, TX
things by hand, the award-winning maker often implements hand-selected untreated sapphires, tourmalines
Category

2010s American Artist Fashion Rings

Materials

Chalcedony, Gold, 18k Gold, Yellow Gold

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Untreated Sapphire For Sale on 1stDibs

Surely you’ll find the exact untreated sapphire you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and Platinum. In our selection of items, you can find a vintage example as well as a contemporary version. You’re likely to find the perfect untreated sapphire among the distinctive items we have available, which includes versions made as long ago as the 19th Century as well as those produced as recently as the 21st Century. For this particular piece, 1.5 Carat and 2 Carat are consistently popular carat weights. Finding an appealing untreated sapphire — no matter the origin — is easy, but Fine Jewels UK, Emeralds Maravellous and Emilio! each produced a popular version that is worth a look. Today, if you’re looking for an oval cut version of this piece and are unable to find the perfect match, our selection also includes pear cut and cushion cut alternatives. Most of our untreated sapphire for sale are for women, but there are 73 pieces available to browse for men.

How Much is a Untreated Sapphire?

The price for an untreated sapphire starts at $311 and tops out at $6,500,000 with these rings, on average, selling for $3,520.

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.