Skip to main content

Antique No Heat Sapphire

to
12
398
86
320
320
164
114
103
57
52
36
30
18
10
9
9
6
5
3
3
2
1
1
1
1
1
12
3
2
1
1
Sort By
Art Deco Sapphire and Diamond Brooch, Burma No Heat
Located in Hummelstown, PA
with vivid blue sapphire petals punctuated by shimmering old mine-cut diamonds, floating within a
Category

1910s Unknown Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Victorian GIA Burma no heat pink sapphire diamond navette ring
Located in Beverly Hills, CA
Certificate: GIA 2221367806 Center Stone: 1 cushion cut Burma no heat pink sapphire Weight
Category

1880s Victorian Antique No Heat Sapphire

Materials

Diamond, Pink Sapphire, Gold, 18k Gold

Victorian No Heat Ceylon Yellow Sapphire 2.25ctw + Diamond Earrings
Located in Narberth, PA
. Incredible Pear Cut yellow Ceylon sapphires, weighing 2.25ctw together, are held within a milgrained yellow
Category

1880s Unknown Victorian Antique No Heat Sapphire

Materials

Diamond, Yellow Sapphire, 18k Gold, Yellow Gold, Sterling Silver, Mixed ...

Vintage Platinum 5.11 Carat Ceylon Sapphire Ring GIA No Heat
Located in Montgomery, AL
We are loving this beautiful pastel blue sapphire!!! She has a certificate from GIA stating Sri
Category

1920s Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Victorian 15k No Heat Ceylon Sapphire Link Bracelet 15+ctw
Located in Narberth, PA
assorted cut graduated sapphires in a bloomed 15k yellow gold fluted bezel link setting. The sapphires all
Category

Early 20th Century Victorian Antique No Heat Sapphire

Materials

Sapphire, 15k Gold

1.00 Carat Purple Sapphire No Heat Platinum Art Deco Engagement Ring
Located in Stamford, CT
simple platinum setting. The sapphire is AGL certified bright purple no heat and no enhancements. AGL
Category

Early 20th Century Antique No Heat Sapphire

Materials

Sapphire, Purple Sapphire, Platinum

Antique 14K Gold Silver No Heat Ceylon Sapphire Diamond Ring Circa 1870-1890
Located in New Orleans, LA
Antique 14K Gold Silver No Heat Ceylon Sapphire Diamond Ring Circa 1870-1890. Ceylon
Category

Late 19th Century American Antique No Heat Sapphire

Materials

Diamond, Sapphire, 14k Gold, Silver

GIA Certified No Heat 25ctw Blue Sapphire Art Deco Platinum Line Bracelet
Located in Santa Barbara, CA
A masterpiece in clean symmetry, this authentic Art Deco sapphire straight line bracelet is a must
Category

1910s Art Deco Antique No Heat Sapphire

Materials

Sapphire, Blue Sapphire, Platinum

Victorian Diamond and Certified No-Heat Burma Pink Sapphire Ring
Located in Northampton, MA
Natural, unheated Burmese pink sapphires and a halo of single-cut diamonds surround a central oval
Category

Late 19th Century American Late Victorian Antique No Heat Sapphire

Materials

Diamond, Pink Sapphire, 18k Gold, Silver

AGL Certified 7.76 Carat Oval No Heat Burma Blue Sapphire Ring in Platinum
Located in Miami, FL
AGL Certified 7.76 Carat natural Burma Cushion Cut Blue Sapphire Ring in Platinum. Originating from
Category

Early 20th Century Burmese Edwardian Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Platinum

Art Deco No Heat Natural Blue Sapphire Diamond Platinum Cocktail Ring Antique
Located in Boca Raton, FL
This late Art Deco platinum ring features a stunning approximately 2.50-carat cushion-cut no heat
Category

Early 20th Century American Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Edwardian 2.48 Carats No Heat Burma Sapphire Diamond Platinum Halo Ring GIA
Located in Philadelphia, PA
Report: 2225846712 Stock Number: We-11120 This halo ring features a vibrant, no-heat Burmese sapphire
Category

Early 1900s Edwardian Antique No Heat Sapphire

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Cartier Art Deco No Heat Ceylon Purple Sapphire Platinum Unisex Signet Ring
By Cartier
Located in Philadelphia, PA
Centering an emerald cut sapphire weighing 7.83 carats - flush set in an octagonal signet face
Category

1920s Antique No Heat Sapphire

Materials

Purple Sapphire, Platinum

Art Deco Platinum Shield Sapphire European Diamond Earrings Burma No Heat GIA
Located in Winter Springs, FL
natural Burmese sapphire of shield cut design. The sapphires are particularly rare, accompanied by a GIA
Category

Early 20th Century Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Victorian 18k/Sterling Silver GIA No Heat Ceylon Sapphire Diamond Ring
Located in Narberth, PA
Sapphire's origin as Ceylon (Sri Lanka) with no indication of heat treatment. An absolutely breathtaking
Category

1880s Victorian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Gold, 18k Gold, Yellow Gold, Sterling Silver

Edwardian 2.33 CTW No Heat Burma Sapphire Diamond Platinum Antique Drop Necklace
Located in Philadelphia, PA
Designed as a cable link chain featuring a sapphire and diamond drop station Sapphire weighs
Category

1910s Edwardian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Art Deco Platinum 3 Carat No Heat Blue Sapphire Oval GIA Diamond Ring
Located in Los Angeles, CA
Art Deco Platinum Sapphire and Diamond Ring Circa 1920 This exquisite Art Deco ring showcases a
Category

Early 20th Century Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Victorian 11.06 CTW No Heat Ceylon Sapphire Diamond 14K Gold Antique Ring
Located in Philadelphia, PA
Centering a cushion cut sapphire weighing approximately 9.26 carats total - transparent light blue
Category

1860s Victorian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Gold, 14k Gold, Yellow Gold, Enamel

Edwardian 5.79 CTW No Heat Ceylon Sapphire Diamond Platinum 14 Karat Halo Ring
Located in Philadelphia, PA
Centering an elongated cushion cut sapphire weighing 4.05 carats - transparent light blue in color
Category

1910s Edwardian Antique No Heat Sapphire

Materials

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

Victorian 1863 No Heat Burma Pink Sapphire Diamond 18K Gold Antique Halo Ring
Located in Philadelphia, PA
Centering a mixed cushion cut sapphire weighing 1.66 carats - transparent deeply saturated vibrant
Category

1860s Victorian Antique No Heat Sapphire

Materials

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

Victorian No Heat Burma Pink Sapphire Diamond 14K Gold Antique Halo Ring GIA
Located in Philadelphia, PA
Centering an oval cut sapphire weighing approximately 0.63 carat total - transparent medium pink
Category

1870s Victorian Antique No Heat Sapphire

Materials

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

Georgian 13.01 CTW No Heat Burma Sapphire Diamond Antique 14 Karat Gold Ring
Located in Philadelphia, PA
Centering an oval cut sapphire weighing 11.63 carats total - transparent light to medium blue
Category

19th Century Georgian Antique No Heat Sapphire

Materials

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

Emilio Jewelry AGL Certified 16.71 Carat Burma No Heat Sugar Loaf Sapphire Ring
By Emilio!
Located in New York, NY
magnificent natural AGL certified 15.71ct no heat sugar loaf sapphire, NO HEAT. The approximate diamond
Category

15th Century and Earlier Antique No Heat Sapphire

Materials

Sapphire, Platinum

Vintage 1.51 Carat No Heat Blue Sapphire Antique Gold Ring Fine Estate Jewelry
Located in Montreal, QC
Carat NO HEAT Blue Sapphire. The Sapphire has intact crystal inclusions indicating it has no evidence of
Category

Late 19th Century Victorian Antique No Heat Sapphire

Materials

Blue Sapphire, Gold, 9k Gold

Antique Tiffany Co. 4.21 Carats No Heat Burmese Sapphire Ring in Yellow Gold
Located in New York, NY
An antique fashion ring, featuring an AGL certified 4.21 carats round cut Burmese blue sapphire
Category

1920s American Art Deco Antique No Heat Sapphire

Materials

Blue Sapphire, Yellow Gold

Art Deco 14K White Gold Natural No Heat Cornflower Blue Sapphire 1.50CTW Ring
Located in Cape May, NJ
Art Deco 14k white gold natural no heat cornflower blue sapphire 1.50ctw ring Era: Art Deco
Category

1920s Art Deco Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, White Gold

Art Deco GIA 26.5ct Natural No-Heat Star Blue Sapphire Platinum Diamond Ring
Located in New York, NY
Art Deco 1920's GIA 26.5ct Natural No-Heat Star Blue Sapphire Platinum Diamond Ring This Antique
Category

1920s Art Deco Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Platinum

Victorian GIA No-Heat Burmese Pink Sapphires Old Mine Diamond 16KY Gold Ring
Located in New York, NY
Victorian English GIA 1.80ctw No-Heat Burmese Pink Sapphires & Old Mine Diamond Double Rows
Category

1890s English Victorian Antique No Heat Sapphire

Materials

Diamond, Pink Sapphire, Gold

Antique Old Mine 11.30 Carat No Heat Burma Blue Sapphire Diamond Platinum Ring
By Gad Co.
Located in Miami, FL
Shop this antique relic from a simpler time. An unheated 11.30-carat oval cut Blue Sapphire of
Category

19th Century Burmese Art Deco Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Platinum

Edwardian Cert. 5.29 Ct No Heat Ceylon Sapphire Diamond Pearl Rare Drop Earring
Located in Napoli, IT
cushion natural no heat Ceylon origin Sapphires, beautiful intense vibrant Blue colour, nicer than
Category

Early 1900s European Edwardian Antique No Heat Sapphire

Materials

Diamond, Pearl, Sapphire, 18k Gold, Platinum

Art Deco Fancy Sapphire and Diamond Ring GIA No Heat Sri Lanka Circa 1920 s
Located in Wailea, HI
This exquisite Art Deco ring features a stunning 1.71-carat fancy-cut sapphire, certified by GIA as
Category

Early 20th Century Unknown Art Deco Antique No Heat Sapphire

Materials

Diamond, Sapphire, 14k Gold, Platinum

Antique Edwardian Ballerina GIA Burma No-Heat Brooch
Located in Beverly Hills, CA
crafted in 18k white gold and adorned with a vibrant GIA-certified no-heat Burma ruby. The focal point of
Category

Late 19th Century Unknown Edwardian Antique No Heat Sapphire

Materials

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

Vintage 16 Carat Ceylon Sapphire and 4.95 Carat Diamond Platinum Enagement Ring
Located in Jesmond, Newcastle Upon Tyne
detract from the true representation of this stunning no heat sapphire cluster ring with diamonds
Category

1890s Sri Lankan Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

GIA Platinum 18K Blue Sapphire Diamond Pendant Unheated Ceylon Vintage 11.12 Cts
Located in Sylvania, GA
SAPPHIRE DIAMOND ANTIQUE PENDANT! 7.24 CARAT TRANSPARENT BLUE GIA CERTIFIED NATURAL NO HEAT SAPPHIRE
Category

19th Century Victorian Antique No Heat Sapphire

Materials

Diamond, Blue Sapphire, Gold, 18k Gold, Platinum

Art Deco 8.08ct Star Sapphire Ring
Located in Litchfield, CT
luminous 8.08 carat no-heat star sapphire is magnificent! Finely cut and with lovely color, it stars
Category

1920s American Antique No Heat Sapphire

Materials

Diamond, Star Sapphire, 18k Gold

Antique French Unheated Ceylon Sapphire and Diamond Brooch
Located in New York, NY
Diamonds and a 20ct No Heat Sugarloaf Ceylon Sapphire. Made in France, Mid 19th Century.
Category

1850s French Antique No Heat Sapphire

Materials

Diamond, Sapphire

Antique Cabochon Sapphire Diamond Gold Link Bracelet
Located in New York, NY
An antique 18kt yellow gold link bracelet, showcasing a 15ct Ceylon cabochon sapphire (no heat
Category

1890s Antique No Heat Sapphire

Materials

Blue Sapphire, White Diamond, 18k Gold

GIA 1.21 Carat Natural Yellow Orange Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Art Deco 1930's Platinum setting with a yellow orange natural no heat no enhancement oval Sapphire
Category

Early 20th Century Antique No Heat Sapphire

Materials

Diamond, Sapphire, Yellow Sapphire, Platinum

5.90 Carat Natural Sapphire Diamond Gold Bangle Bracelet
Located in Stamford, CT
bright white diamonds and natural blue no heat and no enhancements round graduated Sapphires. 1 Totally
Category

Early 20th Century Antique No Heat Sapphire

Materials

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

Edwardian Platinum Sapphire and Diamond Ring
Located in Banbury, GB
8.52arat no heat gem-quality Ceylon sapphire with Gem And Pearl Lab certification. The elegant cushion-cut
Category

1910s British Edwardian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Edwardian Platinum Diamond and Sapphire 3ctw+ Center
Located in Narberth, PA
platinum, this ring adorns a 3ctw+ no-heat Ceylon sapphire cabochon. The sapphire displays a stunning blue
Category

1910s Unknown Edwardian Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Edwardian French 18k Platinum Sapphire Diamond Ring
Located in Narberth, PA
, this ring features a central no heat 2.35ct emerald cut sapphire. The sapphire is held within a
Category

1910s Edwardian Antique No Heat Sapphire

Materials

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

Josephine Hartwell Shaw Sapphire and Aquamarine Arts and Crafts Brooch
Located in Litchfield, CT
, surrounded by aquamarine and small Montana Sapphires. The large sapphire is no-heat and most likely Ceylon in
Category

Early 1900s American Antique No Heat Sapphire

Materials

Aquamarine, Sapphire, Gold, Sterling Silver

GIA Certified 1.82 Carat Pink Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
baguette side diamonds in a platinum three-stone setting. GIA certified pink sapphire natural no heat no
Category

Early 20th Century Antique No Heat Sapphire

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

GIA Certified 1.82 Carat Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
the GIA as natural, no heat. 1 octagonal Cornflower Blue Sapphire, approx. total weight 1.82cts, VS
Category

Early 20th Century Antique No Heat Sapphire

Materials

Blue Sapphire, Diamond, Sapphire, Platinum

English Antique Sapphire Diamond Silver Gold Cluster Ring
Located in New York, NY
An English Antique 15 karat gold/silver top ring with sapphire and diamonds. The ring has a no heat
Category

1880s English Antique No Heat Sapphire

Materials

Diamond, Sapphire, 15k Gold, Sterling Silver

82.82 Carat Sapphire Diamond Pearl Belle Époque Platinum Dangle Earrings
Located in Stamford, CT
Belle Epoque platinum dangle drop earrings with 2 pear shaped 81.02 Carat sapphires. Old European
Category

Late 19th Century Antique No Heat Sapphire

Materials

Diamond, Natural Pearl, Sapphire, Pearl, Blue Sapphire, Platinum

GIA 5.37 Carat Green Sapphire Diamond Three-Stone Engagement Platinum Ring
Located in Stamford, CT
beautiful sapphire is graded by the GIA as natural, no heat blue green with interesting color zoning in the
Category

Early 20th Century Antique No Heat Sapphire

Materials

Diamond, Sapphire, Green Sapphire, Platinum

Edwardian Platinum 3.7 Carat Sapphire Emerald Diamond Ring
Located in Banbury, GB
3.7carat no-heat gem-quality Ceylon sapphire with Gem Lab certification. SKU
Category

1910s British Edwardian Antique No Heat Sapphire

Materials

Diamond, Emerald, Sapphire, Platinum

Antique Edwardian Platinum Natural Yellow Sapphire Diamond Engagement Ring - GIA
Located in Great Neck, NY
features a natural no heat yellow sapphire in the center with a GIA report. The sapphire is set in a
Category

Early 1900s Edwardian Antique No Heat Sapphire

Materials

Diamond, Yellow Sapphire, Platinum

Victorian Coiled Snake Natural Sapphire Ruby 18 Kt Bangle
Located in Napoli, IT
heat blue sapphire of approx 1.0 Ct (5.94 x 4.57 mm.) 2 round faceted cut rubies to fit the design
Category

1890s European Victorian Antique No Heat Sapphire

Materials

Ruby, Sapphire

GIA Certified Art Deco 4.51 Carat Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Periwinkle blue sapphire and diamond engagement ring. GIA certified oval natural no heat untreated
Category

Early 20th Century Antique No Heat Sapphire

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

2.78 Carat Purple Octagon Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Handmade circa 1920s natural untreated no heat purple Sapphire and diamonds in original Art Deco
Category

Early 20th Century Antique No Heat Sapphire

Materials

Diamond, Sapphire, Platinum

Antique Victorian 14K Yellow Gold Pink Sapphire Diamond Engagement Ring - GIA
Located in Great Neck, NY
gorgeous ring features a no heat pink sapphire that has a GIA report. The sapphire is set in the center of
Category

1890s Victorian Antique No Heat Sapphire

Materials

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

Platinum Sapphire Unheated Purple Diamond GIA Ring Antique Old Mine 17.37 CTS!
Located in Sylvania, GA
HEAT NATURAL SAPPHIRE. This Gorgeous Antique Sapphire Is Crowned With 3.86 Carats of Sparkling VS Old
Category

19th Century Antique No Heat Sapphire

Materials

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

Edwardian 18K Sapphire, Diamond and Burmese Ruby Quatrefoil Ring - AGL
Located in Hummelstown, PA
Burma, no heat, .44 - .50 carat Sapphire: AGL certificate, origin Thailand, no heat, .47 - .51 carat
Category

Early 1900s Burmese Antique No Heat Sapphire

Materials

Diamond, Ruby, Sapphire, 18k Gold

Victorian 2.60 CT Ceylon Natural Sapphire Pearl Russian Locket
Located in Napoli, IT
pearls 3.8/4 mm. Making the petals of the flower and rare Natural NO HEAT Ceylon Sapphire of 2.60 CT (8.3
Category

1870s Russian Victorian Antique No Heat Sapphire

Materials

Pearl, Sapphire, 14k Gold

  • 1
Get Updated with New Arrivals
Save "Antique No Heat Sapphire", and we’ll notify you when there are new listings in this category.

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.