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Loose Heart Gemstones

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1.59 Carat Grey Spinel Gemstone Heart Shape 8 x 7mm Loose Gemstone
Located in Columbus, OH
Presenting a 1.59 carat Grey Spinel gemstone! This gemstone's brilliance and clarity makes it a
Category

2010s American Loose Gemstones

Materials

Spinel

Fine 1.90ct Purplish Pink Rhodolite Garnet Heart Cut Loose Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
Fine 1.90ct Purplish Pink Rhodolite Garnet Heart Cut Loose Gemstone 7.8x6.7mm Fine Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet, Rhodolite

Fine Green Colour Australian Sapphire 1.20ct Heart Cut Loose Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
Fine Green Colour Australian Sapphire 1.20ct Heart Cut Loose Gemstone 7.2x5.5mm Natural Green
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Green Sapphire

Opal Stone 17.23 Carat Heart Shape Natural Ethiopian Loose Gemstone
By Merkaba
Located in Beverly Hills, CA
Natural 17.23 Carat Ethiopian Opal loose gemstone, offered unmounted to someone very special
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal

2.00 Carat Heart Shaped Ruby, Unset Loose Gemstone, GIA Certified
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This heart-shaped ruby weighs exactly 2.00 carats and has beautifully rich, saturated color! It
Category

21st Century and Contemporary Thai Artisan Loose Gemstones

Materials

Ruby

Royal Blue Sapphire 1.58 Ct Heart Natural Heated, Loose Gemstone
Located in South Melbourne, AU
, eye clean clarity and intricate heart shape to reveal a delightful natural sapphire from Ceylon
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

Vivid Pink Sapphire 2.58 Ct Heart Natural Ceylon, Loose Gemstone
Located in South Melbourne, AU
Your heart will skip a beat with this over 2.5 carat heart shaped vivid pink sapphire beauty. A
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

8.0 Carat Natural Loose Imperial Color Citrine Heart Shape Gemstone
Located in Peshawar, PK
: Brazil Color: Yellow Imperial Shape: Heart Certificate: On Demand Month: November . The Many Healing
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

8.0 Carat Natural Loose Imperial Color Citrine Heart Shape Gemstone
8.0 Carat Natural Loose Imperial Color Citrine Heart Shape Gemstone
Free Shipping
H 0.49 in W 0.51 in D 0.38 in L 0.49 in
19.24 Carat AAA Natural Pink Morganite Heart Shape Loose Gemstone Jewelry
Located in New York, NY
lively gemstone that brings a wondrous peace from within, and works well with the heart chakra. Morganite
Category

21st Century and Contemporary Mozambican Loose Gemstones

Materials

Morganite

14.07 Carats Heart Shaped Red Loose Garnet Stone Natural Tanzanian Gemstone
Located in Bangkok, TH
Tanzanian gemstone that captivates with its deep, rich red hue. This exquisite gem boasts a striking heart
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Garnet

6.00 Carats Heart Shaped Loose Pinkish Red Garnet Natural Madagascar's Gemstone
Located in Bangkok, TH
example of nature's beauty encapsulated in a gemstone. Known for its vibrant hue and distinctive heart
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Garnet

5.15 carats Fine Quality Loose Sphene Stone Heart Shaped Madagascar's Gemstone
Located in Bangkok, TH
Shape heart Cut Heart The 5.15-carat Sphene stone, elegantly fashioned into a heart shape
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Beryl

4.50 carats Fine Quality Loose Sphene Stone Heart Shaped Madagascar's Gemstone
Located in Bangkok, TH
Weight 4.50 carats Dim 11.4x10.2x6 mm Clarity VVS Origin Madagascar Treatment None Shape heart Cut
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Beryl

Heart Shaped Rhodolite Loose Garnet Stone 3.50 Carats Natural Malawi Gemstone
Located in Bangkok, TH
Clean Cut Mix Step cut Behold the captivating allure of a 3.50-carat Heart Shaped Rhodolite Loose
Category

21st Century and Contemporary Malawian Art Deco Loose Gemstones

Materials

Garnet, Rhodolite

Silvery Gray Burmese Spinel 2.60 carats Heart Cut Natural Loose Gemstone
Located in Bangkok, TH
Burmese Spinel, a natural gemstone that weighs 2.60 carats and features a heart-cut, making it a rare and
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

Heart-Shaped Russian Emerald Loose Gemstone 0.51 Carat
By Tsarina Jewels
Located in Bangkok, TH
gemstone would make a custom-made jewelry design. Perfect for a Ring or Pendant. Shape - Heart-shaped
Category

2010s Russian Modern Loose Gemstones

Materials

Emerald

Fine 3.08ct Deep Blue Natural Sapphire Heart Cut Loose Rare Gemstone
Located in Birmingham, GB
Fine 3.08ct Deep Blue Natural Sapphire Heart Cut Loose Rare Gemstone 9.2x8mm Natural Deep Blue
Category

21st Century and Contemporary British Loose Gemstones

Materials

Sapphire, Blue Sapphire

2.69 Carats Loose Chrome Tourmaline Heart Cut Stone Natural African Gemstone
Located in Bangkok, TH
Heart Cut Heart The exquisite Chrome Tourmaline is a natural African gemstone that captivates with
Category

21st Century and Contemporary African Modern Loose Gemstones

Materials

Tourmaline, Chrome Tourmaline

10.20 Carat Natural Emerald Heart Cabochon Sugarloaf Unique Cut Loose Gemstone
Located in New York, NY
DETAILS Emerald Weight: 10.20 CT Measurements: 15.2 x 12.2 x 9 mm Shape: Heart Cabochon Color
Category

21st Century and Contemporary American Artisan Loose Gemstones

Materials

Emerald

Fine 3.13 Carat Purplish Pink Rhodolite Garnet Heart Cut Loose Gemstone VVS
By Gems and Jewels UK
Located in Birmingham, GB
Fine 3.13ct Purplish Pink Rhodolite Garnet Heart Cut Loose Gemstone 9x8mm VVS Fine Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet, Rhodolite

11.40 Carat AAA Quality Heart Shape Loose Ametrine Gemstone from Bolivia
Located in Peshawar, PK
& Yellow Clarity: Loupe Clean Certificate: On Demand Shape: Heart For those born in the month of February
Category

21st Century and Contemporary Bolivian Arts and Crafts Loose Gemstones

Materials

Amethyst, Citrine

11.40 Carat AAA Quality Heart Shape Loose Ametrine Gemstone from Bolivia
11.40 Carat AAA Quality Heart Shape Loose Ametrine Gemstone from Bolivia
Free Shipping
H 0.62 in W 0.66 in D 0.37 in L 0.62 in
26.60 Carats Heart Shaped Loose Red Garnet Lot Madagascar's Gemstone (In Box)
Located in Bangkok, TH
gemstone that captivates with its deep, rich red hue. This exquisite gem boasts a striking heart-shaped cut
Category

21st Century and Contemporary Malagasy Modern Loose Gemstones

Materials

Garnet

Fine Deep Green Colour Sapphire 1.26ct Heart Cut Rare Loose Gemstone 6.7x6.6mm
Located in Birmingham, GB
Fine Deep Green Colour Sapphire 1.26ct Heart Cut Rare Loose Gemstone 6.7x6.6mm Natural Green
Category

21st Century and Contemporary British Loose Gemstones

Materials

Sapphire

Fine Vivid Green Colour Sapphire 0.79ct Heart Cut Loose Gemstone 6x4.8mm VVS
By Gems and Jewels UK
Located in Birmingham, GB
Fine Vivid Green Colour Sapphire 0.79ct Heart Cut Loose Gemstone 6x4.8mm VVS Natural Green
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Green Sapphire

1.80 Carat Loose Mint Green Tourmaline Gemstone Heart Shape from Afghan Mines
Located in Peshawar, PK
Gemstone Type : Tourmaline Weight : 1.80 Carats Dimensions : 7.6x7.7x5.4 Mm Origin : Kunar
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

Huge Loose GIA certified heart brilliant diamond 4.57ct
Located in Boca Raton, FL
GIA certified diamond, stunning heart brilliant 4.57 carats! Natural Diamond: Color: Fancy Yellow
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

Loose Diamond - Heart .63ct GIA K I1 Solitaire
Located in Greensboro, NC
Carat: .63ct Cut: Heart Color: K Clarity: I1 Certified by: GIA Report Number: 5222931626
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond

1.25 Carat Loose Stone Emerald Heart Shape Brazil
By ALPENGEM
Located in Montreux, VD
Extremely nice color beautiful Emerald 💚 Heart shape. Origin BRAZIL Minor oil enhancement
Category

2010s Brazilian Loose Gemstones

Materials

Emerald

Aquamarine Heart Shape Gem 8.39 Carat Loose Stone
By Margherita Burgener
Located in Valenza , IT
Loose aquamarine in heart shape, mixed cut. The aquamarine weights is 8.39 carats. Origin Brazil
Category

21st Century and Contemporary Italian Modern Loose Gemstones

Materials

Aquamarine

Loose Sapphire, Heart Cut 1.65 Carat Blue Solitaire
Located in Greensboro, NC
Weight: 1.65ct Treatment: Heating Cut: Heart Color: Blue Dimensions (mm): 7.67 x 8.03 x 3.68
Category

21st Century and Contemporary Unknown Loose Gemstones

Materials

Sapphire

GIA certified fancy light pink heart diamond loose 1.03ct
Located in Boca Raton, FL
Natural Color Diamond: Color: Fancy Light Pink Cut: Heart Brilliant Carat: 1.03ct Clarity: I1
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, Pink Diamond

3.95 Carats Natural Loose Rubellite Tourmaline Gemstone
Located in Peshawar, PK
Loose Rubellite Weight: 3.95 Carats Dimension: 10.3x9.1x5.6 Mm Origin: Africa Shape: Cushion
Category

21st Century and Contemporary Malagasy Anglo-Indian Loose Gemstones

Materials

Tourmaline, Rubelite

3.95 Carats Natural Loose Rubellite Tourmaline Gemstone
3.95 Carats Natural Loose Rubellite Tourmaline Gemstone
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W 0.36 in D 0.23 in L 0.41 in
Peach Sapphire Oval Natural Unheated, Loose Gemstone
Located in South Melbourne, AU
quality and clarity is a statement sapphire that will captivate your heart. This peach sapphire is
Category

21st Century and Contemporary Sri Lankan Modern Loose Gemstones

Materials

Sapphire

Peach Sapphire Oval Natural Unheated, Loose Gemstone
Peach Sapphire Oval Natural Unheated, Loose Gemstone
Free Shipping
W 0.3 in D 0.23 in L 0.36 in
1.00 Carat Loose G / VS2 Heart Shaped Diamond GIA Certified
Located in Sherman Oaks, CA
1.00 Carat Loose G / VS2 Heart Shaped Diamond GIA Certified Diamond General Info GIA Report Number
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

Fine1.13ct Vivid Orange Red Spessartine Garnet Heart Cut Loose Gem 6.2x5.7mm
Located in Birmingham, GB
Fine1.13ct Vivid Orange Red Spessartine Garnet Heart Cut Loose Gem 6.2x5.7mm Fine Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet

Fine Deep Blue Australian Sapphire 2.31ct Heart Cut Rare Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Natural Deep Blue Australian Sapphire Gemstone. 2.31 Carat with a beautiful deep blue colour and
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

Pink Sapphire 1.45 carat Heart Shape Unheated Gemstone
Located in Makola, LK
A Natural Ceylon Unheated Pink Sapphire with a dominant hue of Pink. Cut into a Heart shape, this
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Sapphire, Pink Sapphire

Fine 2.70ct Purplish Pink Rhodolite Garnet Heart Cut Loose Gem VS
By Gems and Jewels UK
Located in Birmingham, GB
Fine 2.70ct Purplish Pink Rhodolite Garnet Heart Cut Loose Gem 8.4x7.6mm VS Fine Natural Rhodolite
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet, Rhodolite

Fine 1.88ct Purplish Pink Rhodolite Garnet Heart Cut Loose Gem 7.8x6.5mm
By Gems and Jewels UK
Located in Birmingham, GB
Fine 1.88ct Purplish Pink Rhodolite Garnet Heart Cut Loose Gem 7.8x6.5mm Fine Natural Rhodolite
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet, Rhodolite

GRA Certified 1.17ct Blue Sapphire Untreated Heart Cut Loose Rare Gem
Located in Birmingham, GB
GRA Certified 1.17ct Blue Sapphire Untreated Heart Cut Loose Rare Gem 7.1x6mm GRA Certified
Category

21st Century and Contemporary British Loose Gemstones

Materials

Blue Sapphire

2.33 Carat Deep Orange Red Spessartine Garnet Heart Cut Loose Gem IF
By Gems and Jewels UK
Located in Birmingham, GB
2.33ct Deep Orange Red Spessartine Garnet Heart Cut Loose Gem 8.4x7.4mm IF Fine Natural
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet

1.18ct Fine Deep Purple Sapphire Heart Cut Rare Loose Cut Gem
Located in Birmingham, GB
1.18ct Fine Deep Purple Sapphire Heart Cut Rare Loose Cut Gem 6.8x5.3mm Natural Deep Purple
Category

21st Century and Contemporary British Loose Gemstones

Materials

Sapphire, Purple Sapphire

1.39ct Pear Pink Tourmaline Loose unset gemstone certified
Located in Jupiter, FL
Pink tourmaline,pear shape., certified! NATURAL GEMSTONE(S): Tourmaline Clarity/Color: Slightly
Category

21st Century and Contemporary Loose Gemstones

Materials

Tourmaline

Heart Shaped Loose Tanzanite Set No Reviews 4.80 Carats '1.20 Carat Each'
Located in Bangkok, TH
Heart Shaped Loose Tanzanite Set No reviews 4.80 carats (1.20 carat each) Tanzanite Gemstone Tanzanite
Category

21st Century and Contemporary Unknown Modern Loose Gemstones

Materials

Tanzanite

Small 1.05 Carats Natural Loose Purplish Pink Rhodolite Garnet Heart Shape
Located in Peshawar, PK
Loose Rhodolite Garneg Weight: 1.05 Carats Dimension: 6.4x6.9x3.6 Mm Origin: Tanzania Shape
Category

2010s Tanzanian Aesthetic Movement Loose Gemstones

Materials

Garnet, Rhodolite

17.70 Carat Natural Loose Ametrine Heart Shape Gem For Necklace Jewellery
Located in Peshawar, PK
& Yellow Shape: Heart Treatment: Non Certficate: On Demand . Ametrine is a unique and captivating gemstone
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Other

10.70 Carat Adorable Loose Blue Topaz Heart Shape Gem For Necklace
Located in Peshawar, PK
Certificate: On Demand Shape: Heart Blue topaz is a stunning gemstone prized for its vibrant blue color and
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Blue Topaz

1.01 Carat Loose F / VVS2 Heart Shaped Cut Diamond GIA Certified
Located in Sherman Oaks, CA
Diamond General Info Diamond Cut: Heart Brilliant Measurements: 6.86 x 6.32 - 3.52 mm GIA
Category

21st Century and Contemporary American Modern Loose Gemstones

Materials

Diamond

GIA Certified Heart 1.00 Total Carat Weight Natural Loose Yellow & Pink Diamonds
Located in רמת גן, IL
GIA Report #5221690928 & #2225671201 GIA Certified Heart 1.00 Total Carat Weight F. Grayish
Category

2010s Modern Loose Gemstones

Materials

Pink Diamond, Yellow Diamond

Untreated Natural Sapphire 1.16ct Fine Green Blue Teal Heart Cut Loose Gem VS
By Gems and Jewels UK
Located in Birmingham, GB
Untreated Natural Sapphire 1.16ct Fine Green Blue Teal Heart Cut Loose Gem VS Natural Untreated
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

5.90 Carat Sublime Quality Natural Loose Sphene Titanite Fire Effect Heart Shape
Located in Peshawar, PK
Loose Sphene Weight: 5.90 Carats Dimension: 10.2 x 11.4 x 7.5 Mm Origin: Warsak Pakistan Shape
Category

21st Century and Contemporary Pakistani Arts and Crafts Loose Gemstones

Materials

Other

1.45 Carats Natural Loose Mint Green Tourmaline Ring Gemstone
Located in Peshawar, PK
Loose Mint Tourmaline Weight: 1.45 Carats Dimension: 6.1x5.9x5.5 Mm Origin: Kunar Afghanistan
Category

21st Century and Contemporary Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

1.45 Carats Natural Loose Mint Green Tourmaline Ring Gemstone
1.45 Carats Natural Loose Mint Green Tourmaline Ring Gemstone
Free Shipping
W 0.24 in D 0.22 in L 0.25 in
4.80 Cts Natural Morganite Trillion Cut Loose Gemstone Jewellery
Located in New York, NY
lively gemstone that brings a wondrous peace from within, and works well with the heart chakra. Morganite
Category

21st Century and Contemporary Loose Gemstones

Materials

Morganite

27.46 Carat Natural Arizona Turquoise Owl Carving Loose Gemstone
By Vaibhav Dhadda
Located in Jaipur, Rajasthan
loose gemstone that can be made into a bespoke pendant necklace or a brooch. *One of a kind intricate
Category

21st Century and Contemporary Indian Contemporary Loose Gemstones

Materials

Turquoise

2.40 Carat Natural Loose Cushion Shape Pink Tourmaline Gemstone
Located in Peshawar, PK
Gemstone Type : Tourmaline Weight : 2.40 Carats Dimensions : 8.2x7.8x5.5 Mm Origin : Kunar
Category

Antique 17th Century Afghan Arts and Crafts Loose Gemstones

Materials

Tourmaline

58.20 Carats Heart Tourmaline Layout Suite Faceted cutstones Natural Gemstone
Located in Jaipur, RJ
Gemstone - Tourmaline Weight- 58.20 Carats Shape - Heart Pieces - 50
Category

21st Century and Contemporary Congolese Art Deco Loose Gemstones

Materials

Tourmaline

Heart Shaped Blue Tanzanite Stone Pair 2.35 carats Natural Tanzanian Gemstone
Located in Bangkok, TH
Clean Shape Heart Cut Heart Introducing an exquisite pair of Heart Shaped Blue Tanzanite Stones
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tanzanite

Purplish Blue Tanzanite Heart Shaped 1.30 Cts Tanzanite Gemstone from Tanzania
Located in Bangkok, TH
: GEMSTONE TYPE: Purplish Blue Tanzanite Heart Shaped WEIGHT: 1.30 carats DIMENSIONS: 6.8 x 6.7 x 4.7mm
Category

21st Century and Contemporary Tanzanian Modern Loose Gemstones

Materials

Tanzanite

Adorable 5.25 Carats Natural Loose Heart Shape Dark Purple Amethyst Gem For Ring
Located in Peshawar, PK
Loose Amethyst Weight: 5.25 Carats Dimension: 11.7 x 12.1 x 7.6 Mm Origin: Brazil Treatment: Non
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Natural Spessartite Orange Garnet Stones Lot Loose Gemstone From Africa
Located in Bangkok, TH
loose gemstones showcases the intense orange hue characteristic of spessartite garnets, evoking the
Category

21st Century and Contemporary African Modern Loose Gemstones

Materials

Garnet

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Loose Heart Gemstones For Sale on 1stDibs

On 1stDibs, there are many options to choose from in our inventory of loose heart gemstones. Pieces in our collection of loose heart gemstones made by Artisan jewelers — as well as those associated with Modern — are very popular. There have been many well-made iterations of these items over the years, but those made by Sarosi By Timeless Gems, Gems and Jewels UK and TJD are often thought to be among the most beautiful. While most can agree that any pick from our collection easily elevates most outfits, but the choice of Sapphire versions from the 9 available is guaranteed to add a special touch to your ensemble. There are many heart cut loose heart gemstones for sale. There aren’t many items for men in our collection of loose heart gemstones, as most of the options available are for women.

How Much are Loose Heart Gemstones?

On average, loose heart gemstones at 1stDibs sell for $867, while they’re typically $218 on the low end and $95,000 for the highest priced versions of this item.

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.