Skip to main content

Loose Stone Cushion Cut

25
to
102
96
93
976
446
32
11
11
8
6
5
4
4
3
3
3
3
3
2
2
2
2
2
2
1
1
1
1
1
1
27
5
4
4
3
Sort By
GIA Certified 1.72 Carat Cushion Cut Diamond Loose Stone
By Roman Malakov
Located in New York, NY
A beautiful cushion cut diamond certified by GIA as G color, SI1 clarity with excellent polish and
Category

21st Century and Contemporary American Loose Gemstones

Materials

Diamond

GIA Certified 1.72 Carat Cushion Cut Diamond Loose Stone
GIA Certified 1.72 Carat Cushion Cut Diamond Loose Stone
Free Shipping
W 0.26 in D 0.19 in L 0.28 in
1.45 Carats Natural Loose Red Burmese Stone Spinel Stone Cushion Cut Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion Behold the allure of this exquisite 1.45 carats Natural Red Burmese Spinel
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

2.54 Carat Loose Blue Spinel Stone Cushion Cut Natural Tanzanian Gemstone
Located in Bangkok, TH
Cut Fancy Cushion Shape Cushion The 2.54 carat Blue Spinel Stone is an exquisite example of
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

3.20 Carats Lagoon Blue Loose Tourmaline Stone Cushion Cut Afghani Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion The stunning 3.20 carat Lagoon Blue Tourmaline Stone showcases the
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

7.15 Carats Sweet Pink Loose Tourmaline Stone Cushion Cut Afghani Gemstone
Located in Bangkok, TH
included Shape cushion Cut fancy cushion The 7.15 carats Sweet Pink Tourmaline Stone showcases a
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

2.60 Carats Baby Pink Loose Tourmaline Stone Cushion Cut Afghani Gemstone
Located in Bangkok, TH
Shape cushion Cut fancy cushion The 2.60 carats Baby Pink Tourmaline Stone showcases a mesmerizing
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

3.21 Carats Loose Blue Tourmaline Stone Cushion Cut Natural Afghan Gemstone
Located in Bangkok, TH
Cut Step Cushion The 3.21 carats Blue Tourmaline Stone is a captivating and exquisite gemstone
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

3.13 Carats Loose Blue Spinel Stone Cushion Cut Natural Tanzanian Gemstone
Located in Bangkok, TH
Cushion Cut Step Cushion The 3.13 carat Light Blue Spinel Stone is an exquisite and captivating
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

1.75 Carats Gray Loose Burmese Spinel Stone Cushion Cut Natural Gemstone
Located in Bangkok, TH
Cushion Cut Fancy Cushion The 1.75 carats Gray Burmese Spinel Stone is a captivating natural gemstone
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.65 Carats Natural Red Burmese Loose Spinel Stone Cushion Cut Gemstone
Located in Bangkok, TH
Shape cushion Cut fancy cushion Behold the allure of this exquisite 1.65 carats Natural Red
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.50 Carats Red Burmese Loose Spinel Stone Cushion Cut Natural Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion Behold the allure of this exquisite 1.50 carats Natural Red Burmese Spinel
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.40 Carats Natural Red Loose Burmese Spinel Stone Cushion Cut Gemstone
Located in Bangkok, TH
Shape cushion Cut fancy cushion Behold the allure of this exquisite 1.40 carats Natural Red Burmese
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

2.67 carats Lavender Loose Spinel Stone Cushion Cut Natural Tanzanian Gemstone
Located in Bangkok, TH
clean Shape cushion Cut fancy cushion The exquisite Lavender Spinel stone, boasting a weight of
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

4.45 Carats Yellow Loose Sphene Stone Fancy Cushion Cut Madagascar's Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion In the realm of exquisite gemstones, a dazzling 4.45 carat Sphene takes
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Beryl

2.55 Carats Vivid Blue Loose Spinel Stone Cushion Cut Natural Tanzanian Gemstone
Located in Bangkok, TH
Cut Step Cushion The 2.55-carat Vivid Blue Spinel Stone is an exquisite example of natural
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Spinel

1.15 Carats Orange Red Burmese Loose Spinel Stone Cushion Cut Natural Gemstone
Located in Bangkok, TH
Burmese Spinel Stone. With its mesmerizing hue reminiscent of a fiery sunset, this cushion cut natural
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

2.05 carats Red Burmese Loose Spinel Stone Step Cushion Cut Natural Gemstone
Located in Bangkok, TH
2.05 carats 7.48x6.69x4.90 mm Treatment None Clarity VVS Origin Burma Shape Cushion Cut Step
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.55 Carats Deep Red Burmese Loose Spinel Stone Cushion Cut Natural Gemstone
Located in Bangkok, TH
Shape cushion Cut fancy cushion Behold the allure of this exquisite 1.55 carats Natural Deep Red
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.30 Carats Natural Red Loose Burmese Spinel Stone Fancy Cushion Cut Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion Behold the allure of this exquisite 1.30 carats Natural Red Burmese Spinel
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.60 Carats Red Burmese Loose Spinel Stone Fancy Cushion Cut Natural Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion Behold the allure of this exquisite 1.60 carats Red Burmese Spinel, a
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.35 Carats Natural Loose Red Burmese Spinel Stone Fancy Cushion Cut Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion Behold the allure of this exquisite 1.35 carats Red Burmese Spinel, a
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

1.37 Carats Red Burmese Loose Spinel Stone Fancy Cushion Cut Natural Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion Behold the allure of this exquisite 1.37 carats Red Burmese Spinel, a
Category

21st Century and Contemporary Burmese Modernist Loose Gemstones

Materials

Spinel

6.17 Carat Pink Cushion Cut Tourmaline Loose Gemstone
Located in Stamford, CT
Cushion cut 6.17ct. pink tourmaline from Afghanistan. Bi-color pink with white that shows at the
Category

21st Century and Contemporary Loose Gemstones

Materials

Tourmaline

Blue Aquamarine Loose stone
Located in Melbourne, AU
A loose aquamrine gem weight : 3.47 ct vibrant blue colour and very sparkle VVS clarity cushion
Category

2010s Australian Loose Gemstones

Materials

Aquamarine

Blue Aquamarine Loose stone
Blue Aquamarine Loose stone
Free Shipping
W 0.52 in D 0.24 in L 0.34 in
Natural Brazilian Morganite 47.05 Carat Cushion Cut Loose Gem
By Margherita Burgener
Located in Valenza , IT
An important natural Brazilian Morganite weighing 47.05 carats, Cushion cut. the stone was
Category

21st Century and Contemporary Brazilian Loose Gemstones

Materials

Morganite

Natural Brazilian Morganite 47.05 Carat Cushion Cut Loose Gem
Natural Brazilian Morganite 47.05 Carat Cushion Cut Loose Gem
Free Shipping
H 0.47 in W 0.77 in L 1.1 in
GIA Certified 4.04 Carat Cushion Cut Loose Diamond H / VS1
Located in New York, NY
Our Gorgeous 4.04 Carat Cushion Cut Natural Loose Diamond will be the star of any unique engagement
Category

2010s American Loose Gemstones

Materials

Diamond

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

1.20 Carat Natural Loose Cushion Cut Red Spinel Gemstone
Located in Peshawar, PK
: Cushion Color: Red Treatment: Non / Natural Certificate: On Demand . The red spinel gemstone is linked to
Category

21st Century and Contemporary Burmese Arts and Crafts Loose Gemstones

Materials

Spinel

Untreated Cushion Cut Blue Sapphire 0.63ct IGI Certified Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Untreated Cushion Cut Blue Sapphire 0.63ct IGI Certified Loose Gem 5.4x4.3mm Natural Untreated
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

3.00 Carats Yellow Loose Chrysoberyl Cushion Cut Natural Tanzanian Gemstone
Located in Bangkok, TH
Shape cushion Cut Cushion The 3.00-carat Yellow Chrysoberyl Cushion Cut Natural Tanzanian Gemstone
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Chrysoberyl

GRA Certified 2.06ct Green Blue Sapphire Loose Cushion Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
GRA Certified 2.06ct Green Blue Sapphire Loose Cushion Cut Gem 9.3x6.4mm GRA Certified Deep Green
Category

20th Century Loose Gemstones

Materials

Blue Sapphire, Sapphire

GRA Certified 2.06ct Green Blue Sapphire Loose Cushion Cut Gem
GRA Certified 2.06ct Green Blue Sapphire Loose Cushion Cut Gem
Free Shipping
H 0.15 in W 0.37 in D 0.26 in
Fine Deep Blue Natural Spinel 1.04ct Cushion Cut Loose Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
Fine Deep Blue Natural Spinel 1.04ct Cushion Cut 8.4x4mm Loose Rare Gem Natural Vivid Blue Spinel
Category

20th Century Loose Gemstones

Materials

Spinel

Marvelous Topaz Gemstone 14.95 carats Cushion Cut Loose Pakistani Topaz Gemstone
Located in Bangkok, TH
(slightly included) Shape Cushion Cut Fancy Cushion Discover the allure of this exquisite topaz loose
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Topaz

Natural Loose Red Burmese Spinel Cushion Cut Gemstone 1.60 Carat
Located in Peshawar, PK
Gorgeous Loose Spinel Weight: 1.60 Carats Dimension: 7x5.9x4.6 Mm Origin: Burma Color: Red Shape
Category

21st Century and Contemporary Burmese Arts and Crafts Loose Gemstones

Materials

Spinel

Astonishing Aquamarine Gemstone 6.95 carats Cushion Cut Loose Gem from Pakistan
Located in Bangkok, TH
Clean Shape Cushion Cut Fancy Cushion Behold the enchanting allure of this exquisite aquamarine
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Aquamarine

Vivid Red Burmese Loose Spinel 2.70 carats Cushion Cut Natural Gemstone
Located in Bangkok, TH
) Treatment : None Origin : Burma Cut : Cushion Shape : Step Cushion Indulge in the timeless allure of the
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

3.25 carats Lagoon Blue Loose Tourmaline Cushion Cut Natural Afghan Gemstone
Located in Bangkok, TH
Cut Mix Cushion The 3.25 carat Lagoon Blue Tourmaline is a mesmerizing gemstone, boasting a Mix
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

5.74 carats Loose Achroite Tourmaline Step Cushion Cut Natural Afghan Gemstone
Located in Bangkok, TH
: Cushion Cut: Step Cushion The 5.74-carat Achroite Tourmaline is an exquisite natural gemstone sourced
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

6.90 carats Bubblegum Pink Loose Tourmaline Step Cushion Cut Nigerian Gemstone
Located in Bangkok, TH
Cushion Cut Step Cushion Bubblegum Pink Tourmaline Stone, a captivating gem originating from Nigeria
Category

21st Century and Contemporary Nigerian Modern Loose Gemstones

Materials

Tourmaline

4.61 carats Loose Greenish Blue Tourmaline Cushion Cut Natural Afghani Gemstone
Located in Bangkok, TH
clean Shape cushion Cut fancy cushion In a breathtaking display of nature's artistry, a 4.61
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

2.80 carats Sea Blue Loose Aquamarine Cushion Cut Natural Nigerian Gemstone
Located in Bangkok, TH
Shape cushion Cut fancy cushion Behold the exquisite beauty of a 2.80-carat Sea Blue Aquamarine
Category

21st Century and Contemporary Nigerian Modern Loose Gemstones

Materials

Aquamarine

5.60 Carats Sea Blue Loose Aquamarine Cushion Cut Natural Pakistani Gemstone
Located in Bangkok, TH
cushion Cut fancy cushion The Sea Blue Aquamarine gemstone, boasting a generous weight of 5.60
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Aquamarine

4.97 carats Greenish Blue Loose Tourmaline Cushion Cut Natural Afghani Gemstone
Located in Bangkok, TH
Shape cushion Cut Fancy cushion In a breathtaking display of nature's artistry, a 4.97 carat
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Bluish Green Tourmaline 3.20- carats Cushion Cut Natural Loose African Gemstone
Located in Bangkok, TH
, Very Slightly Included) Shape Cushion Cut Fancy Cushion The bluish green Tourmaline is a stunning
Category

21st Century and Contemporary African Modern Loose Gemstones

Materials

Tourmaline

Natural Peach Morganite Cushion Cut 11.29 Cts Loose Gemstone Morganite Jewelry
Located in New York, NY
SKU - 60001 Stone : Natural Peach Morganite Shape - Cushion Quality - Eye clean Weight - 11.29
Category

21st Century and Contemporary Mozambican Loose Gemstones

Materials

Morganite

Brazil Natural Aquamarine Cushion Cut 6.12 Cts Loose Gemstone Aquamarine Jewelry
Located in New York, NY
SKU - 80003 Stone - Natural Aquamarine Shape - Cushion Quality - Eye clean Weight - 6.12 cts
Category

21st Century and Contemporary Brazilian Loose Gemstones

Materials

Aquamarine

Green Peridot Cushion Cut Natural Loose Gemstones, 4.90 Carat from Pakistan
Located in Peshawar, PK
in Pakistan, celebrated for yielding some of the world's finest peridots. The cushion cut showcases
Category

21st Century and Contemporary Pakistani Contemporary Loose Gemstones

Materials

Peridot

Green Peridot Cushion Cut Natural Loose Gemstones, 4.90 Carat from Pakistan
Green Peridot Cushion Cut Natural Loose Gemstones, 4.90 Carat from Pakistan
Free Shipping
H 0.34 in W 0.31 in D 0.21 in Dm 0.3 in L 0.32 in
3.05 Carats Natural Loose Seafoam Tourmaline Gemstone Cushion Cut Kunar Mine
Located in Peshawar, PK
Loose Tourmaline Weight: 3.05 Carats Dimension:8.5x7.2x6.2 Color: Seafoam Shape: Cushion Origin
Category

21st Century and Contemporary Afghan Artist Loose Gemstones

Materials

Tourmaline

Gorgeous 14.70 Carats Natural Loose Sky Blue Topaz Perfect Cushion Cut
Located in Peshawar, PK
Loose Blue Topaz Weight: 14.70 Carats Dimensions: 13.4x12.7x9.9 Mm Origin: Brazil Shape: Cushion
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Topaz, Blue Topaz

1.65 Carats Natural Loose Lagoon Green Tourmaline Cushion Cut Afghan Mine
Located in Peshawar, PK
Faceted Tourmaline Weight: 1.65 Carats Dimension: 6.9x6x5 Mm Origin: Afghanistan Shape: Cushion
Category

2010s Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

Fine 1.01ct Light Blue Ceylon Sapphire Cushion Cut Loose Rare Gem VS
By Gems and Jewels UK
Located in Birmingham, GB
Fine 1.01ct Light Blue Ceylon Sapphire Cushion Cut Loose Rare Gem 7.3x5mm VS Light Blue Ceylon
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

9.0 Carat Natural Loose Watermelon Tourmaline Cushion Cut with Rutille Inclusion
Located in Peshawar, PK
Green Shape: Cushion . Bicolor tourmaline is connected to the heart chakra, which makes it good for
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

4.90 Carat Loose Pink Tourmaline Cushion Cut Gemstone for Jewelry Making
Located in Peshawar, PK
Afghanistan Clarity : Eye Clean Shape: Cushion Color: Pink Certificate: On Demand Basically, mint tourmalines
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

TJD Loose 10.89 Carat Cushion Cut Natural Morganite Gemstone for Ring & Pendant
By TJD
Located in New York, NY
Create a Jewellery of your choice with this 16 x 12 mm Cushion Cut Natural Morganite colour stone
Category

21st Century and Contemporary Loose Gemstones

Materials

Morganite

0.87ct Deep Blue Sapphire Square Cushion Cut IGI Certified Rare Loose Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
0.87ct Deep Blue Sapphire Square Cushion Cut IGI Certified Rare Loose Gemstone Natural Deep Blue
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

8.80 Carat Together Natural Loose Amethyst Gemstone Cushion Cut Ring Gems
Located in Peshawar, PK
Mm) Clarity : Clean Origin : Brazil Color: Purple Shape: Cushion Certificate: On Demand Month
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Limited Edition Mint Green Tourmaline 2.45 carats Cushion Cut Afghani Loose Gems
Located in Bangkok, TH
(Very, Very Slightly Included) Shape Cushion Cut Fancy Cushion Experience the luxury of owning a
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

Rare Green Natural Tourmaline Loose Gemstone 2.10Ct Cushion Cut for Ring/Jewelry
Located in Peshawar, PK
mines of Kunar, Afghanistan. Meticulously crafted into a stunning cushion cut design, this gemstone
Category

21st Century and Contemporary Afghan Contemporary Loose Gemstones

Materials

Tourmaline

5.25 Carat Natural Loose Blue Seafoam Tourmaline Cushion Cut Ring Gemstone
Located in Peshawar, PK
: Cushion Color: Seafoam Treatment: Non Certifcate: On Demand . Seafoam tourmaline, also known as mint
Category

Antique Late 19th Century Afghan Art Deco Loose Gemstones

Materials

Tourmaline, Indicolite

6.78 carats Loose Mint Green Tourmaline Step Cushion Cut Natural Afghan Gemstone
Located in Bangkok, TH
6.78 carats 11.6x9x8 mm Clarity: SI Origin: Afghanistan Treatment : None Shape: Cushion Cut: Step
Category

21st Century and Contemporary Afghan Modern Loose Gemstones

Materials

Tourmaline

  • 1
  • ...
Get Updated with New Arrivals
Save "Loose Stone Cushion Cut", and we’ll notify you when there are new listings in this category.

Loose Stone Cushion Cut For Sale on 1stDibs

Find the exact loose stone cushion cut you’re shopping for in the variety available on 1stDibs. Each design created in this style — which was crafted with great care and often made from platinum, gold and 18k gold — can elevate any look. Our collection of these items for sale includes 3 vintage editions and 135 modern creations to choose from as well. Finding the perfect loose stone cushion cut may mean sifting through those created during different time periods — you can find an early version that dates to the 19th Century and a newer variation that were made as recently as the 21st Century. Creating a loose stone cushion cut has been a part of the legacy of many jewelers, but those produced by Sarosi By Timeless Gems, Gems and Jewels UK and Margherita Burgener are consistently popular. A loose stone cushion cut can make for a versatile accessory, but a selection from our variety of 29 sapphire versions can add an especially stylish touch. A cushion cut version of this piece has appeal, but there are also brilliant cut and asscher cut versions for sale. If you’re browsing our inventory for a loose stone cushion cut, 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 Loose Stone Cushion Cut?

The price for a loose stone cushion cut starts at $57 and tops out at $230,000 with these more-jewelry-watches, on average, selling for $1,100.

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.