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Natural Unheated Violet Sapphire Stone 2.06 carats with GIA Report / JupiterGem
Located in Los Angeles, CA
Discover the enchanting beauty of this natural unheated violet sapphire, weighing 2.06 carats. With
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Sapphire

0.81 carats Blue Sapphire Stone Cushion Cut Natural Sri Lankan Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion This exquisite 0.81 carat blue sapphire is a natural gemstone hailing from
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

0.78 Carats Purplish Blue Sapphire Stone Oval Cut Sri Lankan Gemstone
Located in Bangkok, TH
oval Cut faceted This exquisite 0.78 carat purplish blue sapphire is a true marvel of nature
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

0.98 Carats Vivid Blue Sapphire Stone Oval Cut Sri Lankan Gemstone
Located in Bangkok, TH
oval Cut faceted This exquisite 0.98 carat blue sapphire is a true marvel of nature, showcasing
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

Natural Unheated Teal Greenish Blue Sapphire Stone 3.02 carats with GIA Report
Located in Los Angeles, CA
Fall in love with a Natural Unheated Teal Greenish Blue Sapphire, a cushion-shaped gemstone prized
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Blue Sapphire

Natural Unheated Blue Sapphire Stone 6.06 carats with GIA Report / JupiterGem
Located in Los Angeles, CA
Please inquire for more videos/photos. Details Identification: Natural Unheated Blue Sapphire
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Blue Sapphire

0.95 carats Bi color Sapphire Stone Round Cut Natural Sri Lankan Gemstone
Located in Bangkok, TH
Round Cut Round Brilliant NA This exquisite 0.95 carat bi color sapphire stone is a natural treasure
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

0.87 carats Blue Sapphire Stone Pear Cut Natural Gemstone from Sri Lanka
Located in Bangkok, TH
clarity, this loose sapphire boasts a brilliant hue that radiates elegance and sophistication. Perfectly
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

2.73 carats Certified Blue Sapphire Stone Oval Cut Natural Sri Lankan Gemstone
Located in Bangkok, TH
Shape oval Cut faceted Shop this stunning 2.73 carat vivid blue sapphire for sale, expertly cut in
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

1.63 Carats Natural Color Change Sapphire Stone Oval Cut Sri Lankan Gemstone
Located in Bangkok, TH
Shape oval Cut Faceted his exquisite gemstone is a 1.63 carat natural color change sapphire
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

0.91 carats Bi color Sapphire Stone Oval Cut Natural Sri Lankan Gemstone
Located in Bangkok, TH
oval Cut faceted This exquisite 0.81 carat blue sapphire is a natural gemstone hailing from the
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

Natural Unheated Orangy Yellow Blue Sapphire Stone 5.99 carats with GIA Report
Located in Los Angeles, CA
This Natural Orangy Yellow Blue Sapphire, weighing 5.99 carats, is accompanied by a GIA Report for
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Blue Sapphire

Natural Unheated Pink Sapphire Matching Pair Stones 3.20 carats with GIA Report
Located in Los Angeles, CA
Identification: Natural Pink Sapphire • Carat: 3.20 carats • Shape: Oval • Measures: 8.04 x 5.95 x
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Pink Sapphire

70.81 carats multi sapphire Fancy cut stone top quality for jewelry natural gem
Located in Jaipur, RJ
70.81 carats multi sapphire Fancy cut stone top quality for jewelry natural gem Gemstone - multi
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Sapphire

Natural Unheated Pink Sapphire Matching Pair Stones 1.51 carats with GIT Report
Located in Los Angeles, CA
Identification: Natural Unheated Pink Sapphire Matching Pair • Carat: 1.51 carats • Shape: Round
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Pink Sapphire

Natural Pink Sapphire Bracelets 3 sets asscher cut stone For Fine Jewelry gems
Located in Jaipur, RJ
Pink Sapphire 3 Set For Bracelets asscher cutstone For Fine Jewellery gem Size & Weight : 3.00 MM
Category

2010s Malagasy Modern Loose Gemstones

Materials

Pink Sapphire

33.31 carats no-heat multi sapphire top quality 24 pieces cut stone natural gem
Located in Jaipur, RJ
33.31 carats no-heat multi sapphire top quality 24 pieces cut stone natural gem Gemstone
Category

21st Century and Contemporary Unknown Art Deco Loose Gemstones

Materials

Aquamarine, Sapphire

9.20 cts Pink Sapphires 1 Set For Bracelet Heart cut stone For Fine Jewelry gem
Located in Jaipur, RJ
Pink Sapphire 1 Set For Bracelets Heart cutstone For Fine Jewellery gem Size & Weight : 3.5x4 MM
Category

2010s Unknown Modern Loose Gemstones

Materials

Pink Sapphire

11.72 carats Natural rare Zircon 3 Pieces Cut stone for fine jewelry natural gem
Located in Jaipur, RJ
11.72 carats Natural rare Zircon 3 Pieces Cut stone for fine jewelry natural gem Weight - 11.72
Category

21st Century and Contemporary Unknown Art Deco Loose Gemstones

Materials

Aquamarine, Sapphire, Tourmaline

GRS GIA Cert. NO HEAT 4.92ct Royal Blue Sapphire Ring with Diamonds
Located in Irvine, CA
- sapphire loose stone certified by GRS and GIA * Brilliant Diamonds – Accentuating the sapphire in a
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, 18k Gold

44.00 Carats Multicolor Ceylon Sapphire Necklace in Gold
By Emeralds Maravellous
Located in US
pictures of  Sapphires(loose stones) that had been selected for the ensemble of this One of a Kind necklace
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Sapphire, 14k Gold, White Gold, Yellow Gold, 18k Gold, Gold

18k Solid Gold Glory sapphire pendant (**with chain**)
Located in Den Haag, NL
Gold Glory Sapphire Pendant! This pendant is made of 18k solid gold and features a natural loose
Category

21st Century and Contemporary Art Deco Pendant Necklaces

Materials

Sapphire, Gold

18k Solid Gold Glory sapphire pendant (**without chain**)
Located in Den Haag, NL
features a natural loose sapphire as the center stone. The sapphire has a weight of 0.5 carats (approx) and
Category

21st Century and Contemporary Art Deco Pendant Necklaces

Materials

Sapphire, Gold

3.09 Carat Royal Blue Natural Sapphire Loose Stone Octagon(Customization Option)
Located in London, GB
3.09 Carat heated royal blue natural sapphire loose stone octagon (customization option available
Category

2010s Loose Gemstones

Materials

Blue Sapphire

3.06 Carat Royal Blue Natural Sapphire Loose Stone Cushion(Customization Option)
Located in London, GB
3.06 Carat heated royal blue natural sapphire loose stone cushion (customization option available
Category

2010s Loose Gemstones

Materials

Blue Sapphire

Certified 1.35 carat Purple Sapphire Oval Shape Ceylon Origin Ring Stone
Located in Makola, LK
for producing exceptional quality stones. With its VVS clarity. • Variety: Purple Sapphire • Origin
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Alexandrite, Sapphire, Blue Sapphire, Purple Sapphire

Certified 5.15 ct Natural Yellow Sapphire Ceylon Origin Ring Stone
Located in Makola, LK
Natural Yellow Sapphire cushion shape Gemstone, This exquisite gemstone originates from Ceylon (Sri
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

White Diamond, Yellow Diamond, Yellow Sapphire, Padparadscha Sapphire

Certified 4.45 ct Natural Yellow Sapphire Pear Shape Ceylon Origin Ring Stone
Located in Makola, LK
Natural Yellow Sapphire Pear shape Gemstone, This exquisite gemstone originates from Ceylon (Sri
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Yellow Diamond, Yellow Sapphire, Padparadscha Sapphire

Certified 2.05 carat Blue Sapphire Pear Shape Ceylon Origin Ring Stone
Located in Makola, LK
Natural Blue Sapphire Vivid Blue, This exquisite gemstone originates from Ceylon (Sri Lanka), known
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Diamond, Blue Sapphire

Certified 1.30 carat Blue Sapphire Pear Shape Ceylon Origin Ring Stone
Located in Makola, LK
Natural Blue Sapphire Royal Blue color Pear shape. This exquisite gemstone originates from Ceylon
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Diamond, Blue Sapphire, Blue Topaz

GIA Certified 2.36 Octagonal Lavendar Blue Sapphire Loose Stone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This lovely lavendar-blue sapphire has a beautiful and unusual octagonal cut, custom cut by one of
Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Sapphire, Blue Sapphire

4.82carat Natural Blue Sapphire loose Stone oval shape Blue Sapphire
Located in Delhi, DL
Certified no heat no treatment Natural oval shape 4.82carat Blue sapphire Carat: 4.82 cts Colour
Category

21st Century and Contemporary Sri Lankan Art Deco Loose Gemstones

Materials

Blue Sapphire

GIA Certified No Heat Natural 18.18 Carats Blue Star Sapphire Loose Stone
By OGI Ltd
Located in New York, NY
A rare, investment quality GIA no heat, Ceylon Star Sapphire weighing 18..18 carats Sapphire color
Category

20th Century Sri Lankan Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Star Sapphire

AGL Certified 5.75 Carat Burma No Heat Cushion Cut Blue Sapphire Loose Stone
Located in Miami, FL
Loose AGL certified 5.75 carat no heat Burma Blue Sapphire cushion cut with rich blue color and no
Category

21st Century and Contemporary Contemporary Loose Gemstones

Materials

Sapphire

1.45 Carats Sapphire Gemstone Pear Cut Loose Stone From Madagascar
Located in Bangkok, TH
, this loose sapphire boasts a brilliant hue that radiates elegance and sophistication. Perfectly
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Sapphire

0.88 Carats Loose Deep Blue Sapphire Stone Oval Cut Madagascar s Gemstone
Located in Bangkok, TH
Shape oval Cut oval This exquisite 0.88 carat deep blue sapphire stone boasts an elegant oval cut
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Sapphire, Blue Sapphire

1.93 Carats Loose Sapphire Stone Round Cut Natural Sri Lankan Gemstone
Located in Bangkok, TH
Shape round Cut round brilliant This exquisite 1.93 carat loose sapphire stone is a natural
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

1.31 Carats Blue Loose Sapphire Stone Oval Cut Natural Mozambique s Gemstone
Located in Bangkok, TH
Shape oval Cut Oval This exquisite 1.31 carats blue sapphire stone boasts an elegant oval cut
Category

21st Century and Contemporary Mozambican Modern Loose Gemstones

Materials

Sapphire

2.80 carats Loose Pink Sapphire Stone Pear Cut Natural Madagascar s Gemstone
Located in Bangkok, TH
Pear Cut Faceted This exquisite 2.80-carat loose pink sapphire showcases a stunning pear cut that
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Pink Sapphire

2.10 Carat Natural Loose Purple Sapphire Stone Emerald Cut Sri Lankan Gemstone
Located in Bangkok, TH
that Sri Lankan sapphires are known for. Expertly shaped into a precision emerald cut, the stone
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire, Purple Sapphire

GIA No Heat Natural Cabochon Burma Sapphire Weighing 8.35 Carat Loose Stone
By OGI Ltd
Located in New York, NY
Introducing an Exquisite 8.35 Carat GIA Certified Natural Cabochon Burma Sapphire - A Rare Gem of
Category

Vintage 1950s Burmese Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire

Luxurious Sapphire Gemstone 1.60 carats Pear Cut Loose Stone from Sri Lanka
Located in Bangkok, TH
durability and captivating color. blue sapphire sapphire stone sapphire earrings blue sapphire stone
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

6.04 carats Colorful Stones Loose Sapphire Lot Natural Gemstones From Sri Lanka
Located in Bangkok, TH
breathtaking 6.04 carats Colorful Stones Loose Sapphire Lot, a dazzling collection of natural gemstones sourced
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

2.95 carats Loose Unheated Pink Sapphire Stone Oval Cut Natural Madagascar s Gem
Located in Bangkok, TH
Cut Faceted NA This exquisite 2.95-carat loose pink sapphire showcases a stunning oval cut that
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Pink Sapphire

2.15 Blue Loose Sapphire Stone Fancy Oval Cut Natural Sri Lankan Gemstone
Located in Bangkok, TH
Shape oval Cut fancy oval The 2.15-carat Blue Sapphire Stone, with its exquisite Fancy Oval Cut
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

1.00 Carats Deep Blue Loose Sapphire Stone Oval Cut Sri Lankan Gemstone
Located in Bangkok, TH
oval Cut Faceted This exquisite 1.00 carat deep blue sapphire stone boasts an elegant oval cut
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

1.07 Carat Natural Loose Blue Sapphire Stone Octagon Faceted Sri Lankan Gemstone
Located in Bangkok, TH
Cut Octagon This 1.07 Carat Natural Loose Blue Sapphire shines with a vivid royal-blue hue and
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

3.48 carats Multi-Color Stones Lot Natural Loose Sapphire Gemstones From Africa
Located in Bangkok, TH
Gemstone Type Colorful Natural Sapphire From Africa Weight 3.48 carats Each weight 0.78, 0.99, 0.85
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Sapphire

Unheated 4.56 ct. Blue Sapphire Oval GIA, Loose 3-Stone Engagement Ring Gemstone
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This sapphire is a beautiful, slightly violetish-blue color. It is very brilliant and free from
Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Sapphire, Blue Sapphire

2.52 carats Loose Vivid Blue Sapphire Stone Emerald Cut Natural Sri Lankan Gem
Located in Bangkok, TH
it is also called the stone of prosperity. Loose Sapphire heals blood disorders and strengthens the
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

Blue Loose Sapphire Stone 2.00 Carats Step Oval Cut Natural Sri Lankan Gemstone
Located in Bangkok, TH
: Oval Cut: Step Oval Introducing the Blue Sapphire Stone, a captivating gem of timeless allure and
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

2.44 carats Loose Bluish Violet Sapphire Stone Oval Cut Natural Sri Lankan Gem
Located in Bangkok, TH
oval Cut faceted This exquisite 2.44 carat Bluish Violet Sapphire is a natural gemstone sourced
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

0.79 Carats Fine Blue Sapphire Gemstone Sapphire Stone for Jewelry Making
Located in Bangkok, TH
Fine Blue Sapphire Gemstone, available for sale, natural high-quality flawless, 0.79 carats
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

Excellent Grayish Blue Sapphire Stone 1.35 Carats Srilanka Sapphire For Jewelry
Located in Bangkok, TH
Excellent Grayish Blue Sapphire Stone, Available For Sale At Wholesale Price Natural High Quality
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Blue Sapphire

1.79 Carats Teal Sapphire Stone Cushion Cut Natural Madagascar s Gemstone
Located in Bangkok, TH
. Sapphire brings its own particular wisdom and is also known as the wisdom stone.
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Sapphire

1.08 Carats Teal Blue Sapphire Stone Oval Cut Madagascar s Gemstone
Located in Bangkok, TH
Blue Sapphire Stone Oval Cut Madagascar's Gemstone
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Blue Sapphire

1.60 carats Bicolor Parti Sapphire Stone Emerald Cut Natural Madagascar s Gem
Located in Bangkok, TH
Octagon Cut Emerald The 1.60-carat Bicolor Parti Sapphire Stone, with its mesmerizing Emerald Cut
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Sapphire

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Sapphire Loose Stones For Sale on 1stDibs

Find an expansive variety of sapphire loose stones available on 1stDibs. Our collection of sapphire loose stones includes designs that are universally popular, but Artisan and Contemporary styles, specifically, are sought with frequency. Many examples in our inventory of these items are appealing no matter their origins, but Sarosi By Timeless Gems and Mother Nature produced popular versions that are worth a look. There are many oval cut, cushion cut and radiant cut sapphire loose stones for sale. If you’re browsing the variety of sapphire loose stones for sale, you’ll find that many are available today for women, but there are still pieces to choose from for men.

How Much are Sapphire Loose Stones?

Prices for sapphire loose stones can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $844 and can go as high as $34,000, while sapphire loose stones, on average, fetch $3,464.

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.

Finding the Right Loose Gemstones for You

Are you shopping for diamonds and other loose gemstones to create your own custom jewelry? 

Why might you purchase a diamond or gemstone “loose” — that is, on its own, not mounted in a piece of jewelry? Perhaps you’re a connoisseur looking to acquire a unique investment. The scarcity of high-quality colored diamonds, for instance, especially pink diamonds, means that their value increases over time; the same is true of rare Kashmir sapphires and Burmese rubies. Far rarer than diamonds, Paraiba tourmaline, discovered only in the 1980s, is treasured as much for its extraordinary color as its scarcity, both of which contribute to its high value.

A more common scenario would be that you’re hoping to create a very special piece of custom jewelry, such as an engagement ring or a milestone-birthday present, and want to personally select the most beautiful, unusual, or ultra-rare stone you can find and afford. Doing so adds to the romance and substance of the gift and can be a part of the story told as the jewel is passed from generation to generation.

If this sounds like you, read on for tips on becoming one of the world’s savviest gem hunters.

Educate yourself: When buying any piece of gem-set fine jewelry, you should familiarize yourself with the factors that determine a stone’s price. This will enable you to streamline your search for the perfect gem and have intelligent, productive conversations with sellers.

There is a wealth of information online, such as our diamond-buying guide and this overview of colored gemstones for engagement rings. The buying guides of the Gemological Institute of America (GIA), searchable by stone type, are also a widely trusted source for consumers venturing into the world of diamonds and gems for the first time.

Vet your vendor: If you peruse 1stDibs with any regularity, you know there is no shortage of vendors who deal in top-quality loose gemstones. (Read about our vetted sellers.) Finding a trustworthy, established dealer may be as easy as getting a recommendation from friends or family. And, although it may sound obvious, it pays to Google your candidates — and consult customer reviews — before making contact.

Harakh Mehta, designer and founder of the Mumbai, India–based fine-jewelry brand Harakh, has an innate understanding of proper client relations, especially when the customer is in unfamiliar territory. “Start chatting with the dealer, get to know them better," he says. "It’s very important to establish a comfort level. We never push a sale, as we want it to be a carefully considered purchase. So, if the client is not in a rush, we do it over a few virtual meetings or phone calls.”

Request documentation: The best dealers go to great lengths to furnish clients with documents verifying the quality rating, natural origin and provenance of a stone — showing, for example, that loose emerald hails from the famous Muzo mine in Colombia — and disclosing any treatments applied to enhance its appearance. (And who doesn't love emerald jewelry? The most valuable emeralds are the ones that have a deep bluish-green to true green color and no visible inclusions.)

If no grading report is available for a stone you are interested in, the dealer should be able to provide an authenticity document, such as an appraisal or info sheet, that has been signed by an in-house gemologist or professional appraiser. Google those names, too, for extra peace of mind.

Ask for videos and visuals: When transacting with a gem dealer online, you should always request real-time videos and photographs, since professional photos of a stone, usually on a white background, have likely been retouched for optimal presentation.

Read more about how to buy loose gemstones and find your dream gems today on 1stDibs.