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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

1.04ct Untreated Green Sapphire IGI Certified Unheated Oval Cut Rare Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
1.04ct Untreated Green Sapphire IGI Certified Unheated Oval Cut Rare Loose Gem Natural Vivid Green
Category

20th Century Loose Gemstones

Materials

Green Sapphire

Untreated Deep Blue Sapphire 0.55ct Rare Cushion Cut IGI Certified Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Untreated Deep Blue Sapphire 0.55ct Rare Cushion Cut IGI Certified Loose Gem Natural Untreated
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

Deep Blue Untreated Oval Cut Sapphire IGI Certified 0.61ct Loose Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
Deep Blue Untreated Oval Cut Sapphire IGI Certified 0.61ct Loose Rare Gem Natural Deep Blue
Category

20th Century Loose Gemstones

Materials

Blue Sapphire, Sapphire

Blue Thailand Sapphire 1.18 Carat IGI Certified Oval Cut Loose Natural Gem
By Gems and Jewels UK
Located in Birmingham, GB
. Fully certified by IGI in Antwerp, one of their best and most well equipped gem labs. Standard heated
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire

Rare 4.28ct IGI Certified Green Jadeite Jade ‘A’ Grade Oval Cabochon Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare 4.28ct IGI Certified Green Jadeite Jade ‘A’ Grade Oval Cabochon Loose Gem IGI Certified
Category

20th Century Loose Gemstones

Materials

Jade

Deep Royal Blue Untreated Oval Cut Sapphire IGI Certified 0.63ct Loose Rare Gem
By Gems and Jewels UK
Located in Birmingham, GB
Deep Royal Blue Untreated Oval Cut Sapphire IGI Certified 0.63ct Loose Rare Gem Natural Deep Royal
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

1.12ct Deep Blue Sapphire Pear Teardrop Cut IGI Certified Loose Rare Gem
Located in Birmingham, GB
1.12ct Deep 0Blue Sapphire Pear Teardrop Cut IGI Certified Loose Rare Gem Deep Blue Sapphire In
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

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

1.35ct Deep Blue Sapphire Rare Oval Cut IGI Certified Loose Gemstone in Blister
By Gems and Jewels UK
Located in Birmingham, GB
1.35ct Deep Blue Sapphire Rare Oval Cut IGI Certified Loose Gemstone in Blister Natural Deep Blue
Category

20th Century Loose Gemstones

Materials

Blue Sapphire

Magnificent 35.67ct Jade Gemstone - IGI Certified
Located in רמת גן, IL
Magnificent 35.67ct Jade Gemstone - IGI Certified Behold a 35.67-carat magnificent jade of
Category

2010s Israeli Loose Gemstones

Materials

Jade

Magnificent 35.67ct Jade Gemstone - IGI Certified
Located in רמת גן, IL
Magnificent 35.67ct Jade Gemstone - IGI Certified Behold a 35.67-carat magnificent jade of
Category

2010s Israeli Loose Gemstones

Materials

Jade

14.41 ct Morganite Oval IGI Certified
Located in Toronto, Ontario
Description: One Loose Morganite Report Number: GT13353805 Weight: 14.41 cts Measurements
Category

2010s Loose Gemstones

Materials

Morganite

14.41 ct Morganite Oval IGI Certified
14.41 ct Morganite Oval IGI Certified
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W 0.76 in D 0.36 in L 0.57 in
9.62 Ct Tourmaline Oval IGI Certified
Located in Toronto, Ontario
Description: One Loose Tourmaline Report Number: GT13353901 Weight: 9.62 cts Measurements
Category

2010s Brazilian Loose Gemstones

Materials

Tourmaline

9.62 Ct Tourmaline Oval IGI Certified
9.62 Ct Tourmaline Oval IGI Certified
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W 0.67 in D 0.26 in L 0.52 in
1.63 Ct Cushion Blue Sapphire IGI Certified
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13300607 Weight: 1.63 cts Measurements
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

1.63 Ct Cushion Blue Sapphire IGI Certified
1.63 Ct Cushion Blue Sapphire IGI Certified
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W 0.26 in D 0.14 in L 0.22 in
7.68 Ct Purple Tourmaline Pear IGI Certified
Located in Toronto, Ontario
Description: One Loose Tourmaline Report Number: GT13353904 Weight: 7.68 cts Measurements
Category

2010s Brazilian Loose Gemstones

Materials

Tourmaline

7.68 Ct Purple Tourmaline Pear IGI Certified
7.68 Ct Purple Tourmaline Pear IGI Certified
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W 0.63 in D 0.3 in L 0.44 in
Fascinating 10.27ct Sapphire Gemstone - IGI Certified-Star Sapphire
Located in רמת גן, IL
Fascinating 10.27ct Sapphire Gemstone - IGI Certified-Star Sapphire Presenting a breathtaking
Category

2010s Israeli Loose Gemstones

Materials

Star Sapphire

2.78 ct Blue Sapphire Oval IGI Certified Tanzanian
Located in Toronto, Ontario
Description: One Loose Sapphire Report Number: GT13354512 Weight: 2.78 cts Measurements
Category

2010s Tanzanian Loose Gemstones

Materials

Blue Sapphire, Sapphire

2.78 ct Blue Sapphire Oval IGI Certified Tanzanian
2.78 ct Blue Sapphire Oval IGI Certified Tanzanian
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W 0.41 in D 0.17 in L 0.3 in
2.12ct Violet Blue Sapphire, Oval, IGI Certified Unheated
Located in Toronto, Ontario
Description: One Loose Sapphire Report Number: GT13354403 Weight: 2.12 cts Measurements
Category

2010s Loose Gemstones

Materials

Sapphire, Purple Sapphire, Blue Sapphire

2.12ct Violet Blue Sapphire, Oval, IGI Certified Unheated
2.12ct Violet Blue Sapphire, Oval, IGI Certified Unheated
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W 0.3 in D 0.23 in L 0.25 in
1.50 ct Blue Sapphire Pear IGI Certified Thailand
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13412802 Weight: 1.5 cts Measurements
Category

2010s Thai Loose Gemstones

Materials

Blue Sapphire, Sapphire

1.50 ct Blue Sapphire Pear  IGI Certified Thailand
1.50 ct Blue Sapphire Pear  IGI Certified Thailand
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W 0.33 in D 0.15 in L 0.24 in
1.20 Ct Oval Blue Sapphire IGI Certified Unheated
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13300802 Weight: 1.20 cts Measurements
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire, Sapphire

1.20 Ct Oval Blue Sapphire IGI Certified Unheated
1.20 Ct Oval Blue Sapphire IGI Certified Unheated
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W 0.24 in D 0.19 in L 0.22 in
1.31 Ct Oval Blue Sapphire IGI Certified Unheated
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13300808 Weight: 1.31 cts Measurements
Category

2010s Sri Lankan Loose Gemstones

Materials

Sapphire, Blue Sapphire

1.31 Ct Oval Blue Sapphire IGI Certified Unheated
1.31 Ct Oval Blue Sapphire IGI Certified Unheated
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W 0.29 in D 0.15 in L 0.24 in
1.52 ct Cushion Blue Sapphire IGI Certified Unheated
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13300614 Weight: 1.52 cts Measurements
Category

2010s Loose Gemstones

Materials

Blue Sapphire

1.52 ct Cushion Blue Sapphire IGI Certified Unheated
1.52 ct Cushion Blue Sapphire IGI Certified Unheated
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W 0.29 in D 0.17 in L 0.21 in
1.58 Ct Oval Blue Sapphire IGI Certified Unheated
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13522903 Species: Corundum Variety: Sapphire
Category

2010s Loose Gemstones

Materials

Blue Sapphire

1.58 Ct Oval Blue Sapphire IGI Certified Unheated
1.58 Ct Oval Blue Sapphire IGI Certified Unheated
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W 0.34 in D 0.16 in L 0.21 in
1.23ct Vivid Pinkish Purple Sapphire Oval IGI Certified
Located in Toronto, Ontario
Description: One Loose Sapphire Report Number: GT13353808 Weight: 1.23 cts Measurements
Category

2010s Loose Gemstones

Materials

Purple Sapphire

1.23ct Vivid Pinkish Purple Sapphire Oval IGI Certified
1.23ct Vivid Pinkish Purple Sapphire Oval IGI Certified
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W 0.25 in D 0.17 in L 0.22 in
2.19 ct Blue Sapphire Oval IGI Certified Ethiopian
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13412801 Weight: 2.19 cts Measurements
Category

2010s Ethiopian Loose Gemstones

Materials

Blue Sapphire

2.19 ct Blue Sapphire Oval IGI Certified Ethiopian
2.19 ct Blue Sapphire Oval IGI Certified Ethiopian
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W 0.36 in D 0.16 in L 0.28 in
3.52 Ct Cushion Red Natural Zircon IGI Certified
Located in Toronto, Ontario
Description: One Loose Red Zircon Report Number: GT13522906 Species: Zircon Variety: N/A Weight
Category

2010s Loose Gemstones

Materials

Zircon

3.52 Ct Cushion Red Natural Zircon IGI Certified
3.52 Ct Cushion Red Natural Zircon IGI Certified
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W 0.34 in D 0.21 in L 0.29 in
8.96 Ct Blue Sapphire Cushion IGI Certified Ethiopian, Unheated
Located in Toronto, Ontario
Description: One Loose Sapphire Report Number: GT13354505 Weight: 8.96 cts Measurements
Category

2010s Ethiopian Loose Gemstones

Materials

Blue Sapphire

2.29 ct Cabochon Oval Chrysoberyl Cat's Eye IGI Certified
Located in Toronto, Ontario
Description: One Loose Chrysoberyl Cat's Eye Report Number: GT13300711 Weight: 2.29 cts
Category

2010s Sri Lankan Loose Gemstones

Materials

Chrysoberyl

2.29 ct Cabochon Oval Chrysoberyl Cat's Eye IGI Certified
2.29 ct Cabochon Oval Chrysoberyl Cat's Eye IGI Certified
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W 0.26 in D 0.24 in L 0.25 in
Berca IGI Certified 8.43Kt Natural Oval Mixed Cut Aquamarine
By Berca Atelier
Located in Valenza, IT
Aquamarine. As stated in IGI Certicate 514256107 February 4 2022, that will be included, this stone is a
Category

21st Century and Contemporary Thai Contemporary Loose Gemstones

Materials

Aquamarine

Berca IGI Certified 8.43Kt Natural Oval Mixed Cut Aquamarine
Berca IGI Certified 8.43Kt Natural Oval Mixed Cut Aquamarine
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W 0.59 in D 0.33 in L 0.48 in
1.66 Ct Teal Blue Sapphire Cushion IGI Certified Ethiopian
Located in Toronto, Ontario
Description: One Loose Blue Sapphire Report Number: GT13412814 Weight: 1.66 cts Measurements
Category

2010s Ethiopian Loose Gemstones

Materials

Blue Sapphire

1.66 Ct Teal Blue Sapphire Cushion IGI Certified Ethiopian
1.66 Ct Teal Blue Sapphire Cushion IGI Certified Ethiopian
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W 0.27 in D 0.19 in L 0.26 in
2.17 ct Color Change Sapphire Oval IGI Certified Sri Lankan
Located in Toronto, Ontario
Description: One Loose Color Change Sapphire Report Number: GT13412811 Weight: 2.17 cts
Category

2010s Sri Lankan Loose Gemstones

Materials

Sapphire, Blue Sapphire, Purple Sapphire

2.17 ct Color Change Sapphire Oval IGI Certified Sri Lankan
2.17 ct Color Change Sapphire Oval IGI Certified Sri Lankan
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W 0.35 in D 0.15 in L 0.28 in
4.27 Carat IGI Certified Natural Sri Lanka Oval Cabochon Violetish Blue Sapphire
Located in Wan Chai District, HK
and precisely cut in a classic oval cabochon shape, it is truly a gem to behold. Its measurements are
Category

Late 20th Century Loose Gemstones

Materials

Blue Sapphire

1pc. Dazzling 1.02 Carat Round Brilliant Natural Diamond
Located in רמת גן, IL
This stunning 1.02 carat D VVS2 round brilliant cut natural diamond is a truly rare and special gem
Category

2010s Israeli Loose Gemstones

Materials

Diamond

Natural 6.03ct IGI Certified Green Jade ‘A’ Grade Heart Cabochon Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Natural 6.03ct IGI Certified Green Jade ‘A’ Grade Heart Cabochon Loose Gem IGI Certified Untreated
Category

21st Century and Contemporary More Jewelry

Rare 4.03ct IGI Certified Green Jadeite Jade ‘A’ Grade Oval Cabochon Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare 4.03ct IGI Certified Green Jadeite Jade ‘A’ Grade Oval Cabochon Loose Gem Natural IGI
Category

21st Century and Contemporary More Jewelry

Materials

Jade

Rare 4.21ct IGI Certified Green Jadeite Jade ‘A’ Grade Oval Cabochon Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Rare 4.21ct IGI Certified Green Jadeite Jade ‘A’ Grade Oval Cabochon Loose Gem IGI Certified
Category

21st Century and Contemporary More Jewelry

Materials

Jade

IGI Certified 2.27Ct Deep Green Natural Emerald Oval Cut Minor Oil Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
IGI Certified 2.27Ct Deep Green Natural Emerald Oval Cut Minor Oil Loose Gem IGI Certified Natural
Category

21st Century and Contemporary More Jewelry

Materials

Emerald

IGI Certified 1.58ct Natural Deep Green Emerald Oval Cut Loose Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
IGI Certified 1.58ct Natural Deep Green Emerald Oval Cut Loose Gemstone GIA Certified Natural
Category

21st Century and Contemporary More Jewelry

Materials

Emerald

1.22ct Deep Blue Natural Sapphire Rare Oval Cut IGI Certified Loose Gemstone VVS
By Gems and Jewels UK
Located in Birmingham, GB
1.22ct Deep Blue Natural Sapphire Rare Oval Cut IGI Certified Loose Gemstone VVS Natural Deep Blue
Category

21st Century and Contemporary More Jewelry

Materials

Sapphire

0.96 ct Cushion Pink Sapphire IGI Certified
Located in Toronto, Ontario
Description: One Loose Pink Sapphire Report Number: GT13522502 Species: Corundum Variety: Pink
Category

2010s More Jewelry

Materials

Pink Sapphire

0.96 ct Cushion Pink Sapphire IGI Certified
0.96 ct Cushion Pink Sapphire IGI Certified
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W 0.31 in D 0.12 in L 0.18 in
1.33ct Round Teal Blue Sapphire, Diamond Halo Engagement Ring in 18k White Gold
Located in Toronto, Ontario
Ring, IGI certified and set in 18K White Gold. This radiant piece showcases Skyjems's commitment to
Category

2010s Canadian Contemporary Engagement Rings

Materials

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

IGI Certified Loose Colombian Emerald 3.34 Carat Emerald Cut Deep Green Gem
By Gems and Jewels UK
Located in Birmingham, GB
certified by IGI in Antwerp, one of their best and most well equipped gem labs. Has a very good emerald cut
Category

21st Century and Contemporary Loose Gemstones

Materials

Emerald

IGI Certified Loose Colombian Emerald 1.90 Carat Fancy Emerald Cut Green Gem
By Gems and Jewels UK
Located in Birmingham, GB
certified by IGI in Antwerp, one of their best and most well equipped gem labs. Has a very good emerald cut
Category

21st Century and Contemporary Loose Gemstones

Materials

Emerald

IGI Certified Untreated Fancy Orange 0.15 Carat Round Cut Loose Blister Gem
By Gems and Jewels UK
Located in Birmingham, GB
colour. Fully certified by IGI in Antwerp, one of their best and most well equipped gem labs. The
Category

21st Century and Contemporary Loose Gemstones

Materials

Diamond, Yellow Diamond

IGI Certified 1.15 Carat Ceylon Yellow Sapphire Heart Cut Loose Blister Gem
By Gems and Jewels UK
Located in Birmingham, GB
an excellent heart cut. Fully certified by IGI in Antwerp, one of the best and most well equipped
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Yellow Sapphire

IGI Certified Pink Purple Sapphire 1.51ct Unheated Oval Cut Loose Oval Cut Gem
By Gems and Jewels UK
Located in Birmingham, GB
certified by IGI in Antwerp, one of their best and most well equipped gem labs. This sapphire has a
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Pink Sapphire

IGI Certified 8.88ct Deep Red Orange Spessartine Garnet Heart Cut Rare Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
stone so a large size. Fully certified and sealed in blister by IGI in Antwerp. Colour on this stone is
Category

21st Century and Contemporary Loose Gemstones

Materials

Garnet

Blue Green Sapphire 0.87ct Oval Cut IGI Certified Loose Rare Gem
Located in Birmingham, GB
Blue Green Sapphire 0.87ct Oval Cut IGI Certified Loose Rare Gem Green Sapphire In IGI Blister
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

Natural Loose Deep Blue Sapphire 1.17ct IGI Certified Oval Cut Gem
Located in Birmingham, GB
Natural Loose Deep Blue Sapphire 1.17ct IGI Certified Oval Cut Gem 7.50 x 5.30mm Natural Sapphire
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

Fine Deep Blue Sapphire 0.53ct Cushion Cut IGI Certified Loose Rare Gem
Located in Birmingham, GB
Fine Deep Blue Sapphire 0.53ct Cushion Cut IGI Certified Loose Rare Gem Deep Blue Sapphire In IGI
Category

21st Century and Contemporary Loose Gemstones

Untreated Fancy Pink Purple Diamond IGI Certified Sealed Cushion Cut Loose Gem
Located in Birmingham, GB
Untreated Fancy Pink Purple Diamond IGI Certified Sealed Cushion Cut Loose Gem Certified Fancy
Category

21st Century and Contemporary Loose Gemstones

1.01ct Deep Blue Untreated Sapphire Rare IGI Certified Oval Cut Loose Rare Gem
Located in Birmingham, GB
1.01ct Deep Blue Untreated Sapphire Rare IGI Certified Oval Cut Loose Rare Gem Fine Deep Blue
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

Deep Blue Untreated Thai Sapphire 1.55ct Rare IGI Certified Oval Cut Loose Gem
Located in Birmingham, GB
Deep Blue Untreated Thai Sapphire 1.55ct Rare IGI Certified Oval Cut Loose Gem Deep Blue Untreated
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

IGI Certified Ceylon Yellow Sapphire 1.31ct Emerald Cut Sri Lanka Loose Gemstone
By Gems and Jewels UK
Located in Birmingham, GB
vivid yellow colour. Fully certified by IGI in Antwerp, one of their best and most well equipped gem
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Yellow Sapphire

2.18 Ct Oval Ruby IGI Certified
Located in Toronto, Ontario
Description: One Loose Ruby Report Number: GT13522503 Species: Corundum Variety: Ruby Weight: 2.18
Category

2010s Loose Gemstones

Materials

Ruby

2.18 Ct Oval Ruby IGI Certified
2.18 Ct Oval Ruby IGI Certified
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W 0.37 in D 0.14 in L 0.28 in
2.26 Ct Oval Ruby IGI Certified
Located in Toronto, Ontario
Description: One Loose Ruby Report Number: GT13522504 Species: Corundum Variety: Ruby Weight: 2.26
Category

2010s Mozambican Loose Gemstones

Materials

Ruby

2.26 Ct Oval Ruby IGI Certified
2.26 Ct Oval Ruby IGI Certified
Free Shipping
W 0.36 in D 0.15 in L 0.28 in
2.4 Ct Oval Ruby IGI Certified
Located in Toronto, Ontario
Description: One Loose Ruby Report Number: GT13522508 Species: Corundum Variety: Ruby Weight: 2.4
Category

2010s Mozambican Loose Gemstones

Materials

Ruby

2.4 Ct Oval Ruby IGI Certified
2.4 Ct Oval Ruby IGI Certified
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W 0.36 in D 0.18 in L 0.27 in
23.81 Ct Morganite Oval IGI Certified
Located in Toronto, Ontario
Description: One Loose Morganite Report Number: GT13353910 Weight: 23.81 cts Measurements
Category

2010s Loose Gemstones

Materials

Morganite

23.81 Ct Morganite Oval IGI Certified
23.81 Ct Morganite Oval IGI Certified
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W 0.86 in D 0.5 in L 0.6 in
2.29ct Teal Blue Sapphire, Cushion IGI Certified
Located in Toronto, Ontario
Description: One Loose Sapphire Report Number: GT13354401 Weight: 2.29 cts Measurements
Category

2010s Loose Gemstones

Materials

Blue Sapphire

2.29ct Teal Blue Sapphire, Cushion IGI Certified
2.29ct Teal Blue Sapphire, Cushion IGI Certified
Free Shipping
W 0.3 in D 0.2 in L 0.27 in
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Igi Loose Gems For Sale on 1stDibs

On 1stDibs, there are many options to choose from in our inventory of igi loose gems. These distinct designs — crafted with great care and often made from gold, 18k gold and white gold — can elevate any look. Our selection of items includes 14 vintage examples as well as 60 contemporary versions. Our collection is diverse and broad-ranging, and pieces in stock date back to the 20th Century while others were produced as recently as the 21st Century. Our collection of igi loose gems includes designs that are universally popular, but contemporary and modern styles, specifically, are sought with frequency. Many examples in our inventory of these items are appealing no matter their origins, but Gems and Jewels UK and Berca Atelier produced popular versions that are worth a look. Many pieces in our collection are stylish for most occasions, but sapphire versions, from our inventory of 47, can add a particularly distinctive touch to your look, day or night. Today, if you’re looking for oval cut igi loose gems and are unable to find the perfect match, our selection also includes brilliant cut and mixed cut alternatives. When shopping our range of igi loose gems, you’ll find that there are less available pieces for women today than there are for men.

How Much are Igi Loose Gems?

On average, igi loose gems at 1stDibs sell for $439, while they’re typically $178 on the low end and $17,920 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.