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12.15 carat Swiss Blue Topaz, Ball loose Topaz from Brazil, Natural Gems, 8.6 mm, Photo A

12.15 carat Swiss Blue Topaz, Ball loose Topaz from Brazil, Natural Gems, 8.6 mm

Topaz

12.15ct total2 pcs
$ 108.21
8.6 mm
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1.65 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm, Photo A

1.65 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm

Zircon

1.65ct total2 pcs
$ 9.88
6.1 x 4.2 mm
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4.5 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 9.9 mm, Photo A

4.5 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 9.9 mm

Citrine

4.50ct1 pc
$ 27.13
14.1 x 9.9 mm
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42.8 ct Fancy Jasper, 50.5 x 24.8 mm From Indonesia, Photo A

42.8 ct Fancy Jasper, 50.5 x 24.8 mm From Indonesia

Jasper

42.80ct1 pc
$ 33.90
50.5 x 24.8 mm
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20.99 ct Blue Green Turquoise, 21.5 x 16.3 mm Oval Cut From the United States, Photo A
Click for Product Video (678692)

20.99 ct Blue Green Turquoise, 21.5 x 16.3 mm Oval Cut From the United States

Turquoise

20.99ct1 pc
$ 63.39
21.5 x 16.3 mm
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13.17 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 22.7 x 11.9 mm, Photo A

13.17 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 22.7 x 11.9 mm

Ammolite

13.17ct1 pc
$ 217.31
22.7 x 11.9 mm
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1.87 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.3 x 5.2 mm, Photo A

1.87 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.3 x 5.2 mm

Topaz

1.87ct total2 pcs
$ 13.27
7.3 x 5.2 mm
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1.26 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 18.7 x 3 mm, Photo A

1.26 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 18.7 x 3 mm

Tourmaline

1.26ct1 pc
$ 33.26
18.7 x 3 mm
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2.63 ct Round Cut Strawberry Quartz, 9.2 mm From Russia, Photo A

2.63 ct Round Cut Strawberry Quartz, 9.2 mm From Russia

Strawberry Quartz

2.63ct1 pc
$ 13.15
9.2 mm
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16.98 ct Oval Jasper, 31.2 x 20 mm From Indonesia, Photo A

16.98 ct Oval Jasper, 31.2 x 20 mm From Indonesia

Jasper

16.98ct1 pc
$ 14.01
31.2 x 20 mm
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2.08 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.3 x 6.6 mm, Photo A

2.08 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.3 x 6.6 mm

Hessonite Garnet

2.08ct1 pc
$ 38.90
8.3 x 6.6 mm
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24.2 ct Marquise Hematite, 26.4 x 13.2 mm From Brazil, Photo A

24.2 ct Marquise Hematite, 26.4 x 13.2 mm From Brazil

Hematite

24.20ct1 pc
$ 23.69
26.4 x 13.2 mm
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0.71 ct Purple Spinel, 5.7 x 4.8 mm Oval Cut From Tanzania, Photo A

0.71 ct Purple Spinel, 5.7 x 4.8 mm Oval Cut From Tanzania

Spinel

0.71ct1 pc
$ 58.58
5.7 x 4.8 mm
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11.12 carat Pear Shape Mystic Quartz, loose Certified Mystic Quartz from Brazil, Natural Gem, 19.9 x 15.1 mm, Photo A

11.12 carat Pear Shape Mystic Quartz, loose Certified Mystic Quartz from Brazil, Natural Gem, 19.9 x 15.1 mm

Mystic Quartz

11.12ct1 pc
$ 55.60
19.9 x 15.1 mm
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4.79 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.1 x 10.2 mm, Photo A

4.79 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.1 x 10.2 mm

Amethyst

4.79ct1 pc
$ 34.94
14.1 x 10.2 mm
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1.14 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 5.9 mm, Photo A

1.14 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 5.9 mm

Zircon

1.14ct1 pc
$ 27.31
5.9 mm
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3.35 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm, Photo A

3.35 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

Topaz

3.35ct total4 pcs
$ 25.80
7.1 x 5.1 mm
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0.89 carat Green Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 7.1 x 5.2 mm, Photo A

0.89 carat Green Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 7.1 x 5.2 mm

Sapphire

0.89ct1 pc
$ 71.20
7.1 x 5.2 mm
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6.24 ct Marquise Slice Ruby in Fuchsite, 23.8 x 12 mm From Ethiopia, Photo A

6.24 ct Marquise Slice Ruby in Fuchsite, 23.8 x 12 mm From Ethiopia

Ruby in Fuchsite

6.24ct1 pc
$ 42.62
23.8 x 12 mm
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1.06 carat Orange Hessonite Garnet, Pear Shape loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.8 x 5.7 mm, Photo A
Click for Product Video (554611)

1.06 carat Orange Hessonite Garnet, Pear Shape loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.8 x 5.7 mm

Hessonite Garnet

1.06ct1 pc
$ 23.32
7.8 x 5.7 mm
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5.81 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gems, 6.1 x 6 mm, Photo A

5.81 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gems, 6.1 x 6 mm

Citrine

5.81ct total6 pcs
$ 31.96
6.1 x 6 mm
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3.04 ct Square Cut Rainbow Moonstone, 3 x 3 mm From India, Photo A

3.04 ct Square Cut Rainbow Moonstone, 3 x 3 mm From India

Rainbow Moonstone

3.04ct total20 pcs
$ 56.85
3 x 3 mm
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1.32 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 6.2 mm, Photo A

1.32 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 6.2 mm

Zircon

1.32ct1 pc
$ 29.04
6.2 mm
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24.26 carat Green Aventurine, Pear loose Aventurine from Brazil, Natural Untreated Gem, 33.2 x 17.4 mm, Photo A

24.26 carat Green Aventurine, Pear loose Aventurine from Brazil, Natural Untreated Gem, 33.2 x 17.4 mm

Aventurine

24.26ct1 pc
$ 24.26
33.2 x 17.4 mm
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9.44 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 12.2 x 10 mm, Photo A

9.44 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 12.2 x 10 mm

Citrine

9.44ct total2 pcs
$ 72.69
12.2 x 10 mm
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1.96 ct White Moonstone, 7.4 mm Round Cut From India, Photo A

1.96 ct White Moonstone, 7.4 mm Round Cut From India

Moonstone

1.96ct1 pc
$ 6.20
7.4 mm
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1.6 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 6.6 mm, Photo A

1.6 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 6.6 mm

Zircon

1.60ct1 pc
$ 35.20
6.6 mm
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97.43 ct Green Agate, 28 x 27.9 mm Pyramid Cut From Indonesia, Photo A

97.43 ct Green Agate, 28 x 27.9 mm Pyramid Cut From Indonesia

Agate

97.43ct1 pc
$ 34.10
28 x 27.9 mm
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3.44 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 8.9 x 8.8 mm, Photo A

3.44 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 8.9 x 8.8 mm

Citrine

3.44ct1 pc
$ 26.49
8.9 x 8.8 mm
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2.43 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.2 x 5.2 mm, Photo A

2.43 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.2 x 5.2 mm

Zircon

2.43ct total2 pcs
$ 16.04
7.2 x 5.2 mm
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1.71 ct Blue Kyanite, 8 x 6 mm Oval Cut From Nepal, Photo A

1.71 ct Blue Kyanite, 8 x 6 mm Oval Cut From Nepal

Kyanite

1.71ct1 pc
$ 34.20
8 x 6 mm
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3.65 ct Oval Buff Top Chalcedony, 11.1 x 9.1 mm From Brazil, Photo A

3.65 ct Oval Buff Top Chalcedony, 11.1 x 9.1 mm From Brazil

Chalcedony

3.65ct1 pc
$ 3.65
11.1 x 9.1 mm
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Photos are of Actual Products for Sale

Cassiterite is a tin oxide mineral, and is the primary ore for tin. In addition to its important industrial use, it has some interesting properties that make high quality crystals valuable as gemstones. Cassiterite is reasonably hard, with a rating on the Mohs scale of 6 to 7. It tends to be opaque though thin crystals can be translucent. Its chief virtue is its multiple crystal faces and outstanding luster. Many specimens are graded as having "adamantine" (diamond-like) or submetallic luster.

Cassiterite is one of the densest gem materials known. It also has a very high refractive index, higher than zircon, sphene and demantoid garnet.

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