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0.7 carat Yellow Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 6.1 x 5.1 mm, Photo A

0.7 carat Yellow Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 6.1 x 5.1 mm

Sapphire

0.70ct1 pc
$ 67.22
6.1 x 5.1 mm
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3.08 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12.3 x 9.2 mm, Photo A

3.08 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 12.3 x 9.2 mm

Citrine

3.08ct1 pc
$ 18.73
12.3 x 9.2 mm
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11 ct Odd Shaped Druzy Variscite, 23.5 x 14.4 mm From Australia, Photo A

11 ct Odd Shaped Druzy Variscite, 23.5 x 14.4 mm From Australia

Druzy Variscite

11.00ct1 pc
$ 16.83
23.5 x 14.4 mm
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2.64 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.9 x 4 mm, Photo A

2.64 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.9 x 4 mm

Pyrope Garnet

2.64ct total4 pcs
$ 18.48
5.9 x 4 mm
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5.33 carat Round Almandine Garnet, loose Certified Almandine Garnet from Madagascar, Natural Untreated Gems, 3.2 mm, Photo A

5.33 carat Round Almandine Garnet, loose Certified Almandine Garnet from Madagascar, Natural Untreated Gems, 3.2 mm

Almandine Garnet

5.33ct total30 pcs
$ 29.32
3.2 mm
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1.3 ct Yellow Beryl, 8.2 x 8.1 mm Trillion Cut From Brazil, Photo A

1.3 ct Yellow Beryl, 8.2 x 8.1 mm Trillion Cut From Brazil

Beryl

1.30ct1 pc
$ 31.20
8.2 x 8.1 mm
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3.77 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 9 mm, Photo A

3.77 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 9 mm

Citrine

3.77ct1 pc
$ 16.59
11.1 x 9 mm
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6.12 ct White Moonstone, 9.1 mm Round Cut From India, Photo A

6.12 ct White Moonstone, 9.1 mm Round Cut From India

Moonstone

6.12ct total2 pcs
$ 16.83
9.1 mm
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1.49 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.2 x 5.3 mm, Photo A

1.49 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.2 x 5.3 mm

Ruby

1.49ct1 pc
$ 44.70
7.2 x 5.3 mm
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1.08 ct Loose Violet Sapphire, 6.9 x 5.5 mm Cushion Cut From Tanzania, Photo A

1.08 ct Loose Violet Sapphire, 6.9 x 5.5 mm Cushion Cut From Tanzania

Sapphire

1.08ct1 pc
$ 356.40
6.9 x 5.5 mm
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6.45 ct Oval Cut Strawberry Quartz, 14.1 x 10.3 mm From Russia, Photo A

6.45 ct Oval Cut Strawberry Quartz, 14.1 x 10.3 mm From Russia

Strawberry Quartz

6.45ct1 pc
$ 39.03
14.1 x 10.3 mm
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0.71 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gems, 4.3 mm, Photo A

0.71 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gems, 4.3 mm

Kyanite

0.71ct total2 pcs
$ 17.75
4.3 mm
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1.32 carat Pear Shape Color-Change Diaspore, loose Certified Color-Change Diaspore from Turkey, Natural Untreated Gem, 8.6 x 5.7 mm, Photo A

1.32 carat Pear Shape Color-Change Diaspore, loose Certified Color-Change Diaspore from Turkey, Natural Untreated Gem, 8.6 x 5.7 mm

Color-Change Diaspore

1.32ct1 pc
$ 70.62
8.6 x 5.7 mm
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1.62 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5 mm, Photo A

1.62 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5 mm

Pyrope Garnet

1.62ct total2 pcs
$ 12.47
5.1 x 5 mm
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0.97 ct Oval Sillimanite Cat's Eye, 7 x 4 mm From Madagascar, Photo A

0.97 ct Oval Sillimanite Cat's Eye, 7 x 4 mm From Madagascar

Sillimanite Cat's Eye

0.97ct1 pc
$ 2.91
7 x 4 mm
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152.1 ct Yellow Quartz, 35.7 x 30.2 mm Oval Portuguese Cut From Brazil, Photo A
Click for Product Video (341771)

152.1 ct Yellow Quartz, 35.7 x 30.2 mm Oval Portuguese Cut From Brazil

Quartz

152.10ct1 pc
$ 349.68
35.7 x 30.2 mm
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2.62 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 6.1 x 4 mm, Photo A

2.62 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 6.1 x 4 mm

Tanzanite

2.62ct total6 pcs
$ 216.15
6.1 x 4 mm
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1.78 ct Oval Sillimanite Cat's Eye, 6.3 x 4.7 mm From Madagascar, Photo A

1.78 ct Oval Sillimanite Cat's Eye, 6.3 x 4.7 mm From Madagascar

Sillimanite Cat's Eye

1.78ct total2 pcs
$ 5.64
6.3 x 4.7 mm
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2.63 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.1 mm, Photo A

2.63 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.1 mm

Zircon

2.63ct total2 pcs
$ 15.68
7.1 x 5.1 mm
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3.07 ct Loose Yellow Sapphire, 5.1 mm Round Cut From Tanzania, Photo A

3.07 ct Loose Yellow Sapphire, 5.1 mm Round Cut From Tanzania

Sapphire

3.07ct total4 pcs
$ 169.63
5.1 mm
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0.57 carat Pink Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 6.4 x 4.4 mm, Photo A

0.57 carat Pink Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 6.4 x 4.4 mm

Sapphire

0.57ct1 pc
$ 188.10
6.4 x 4.4 mm
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4.97 carat Barrel Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 9.1 x 4.6 mm, Photo A

4.97 carat Barrel Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 9.1 x 4.6 mm

Amethyst

4.97ct total5 pcs
$ 32.80
9.1 x 4.6 mm
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0.69 ct Oval Cut Fire Opal, 8.1 x 6.1 mm From Mexico, Photo A

0.69 ct Oval Cut Fire Opal, 8.1 x 6.1 mm From Mexico

Fire Opal

0.69ct1 pc
$ 18.98
8.1 x 6.1 mm
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1.33 ct Loose Princess Cut Sapphire, 2.2 x 2.2 mm From Tanzania, Photo A

1.33 ct Loose Princess Cut Sapphire, 2.2 x 2.2 mm From Tanzania

Sapphire

1.33ct total15 pcs
$ 159.60
2.2 x 2.2 mm
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1.58 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.1 mm, Photo A

1.58 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.1 mm

Tanzanite

1.58ct total8 pcs
$ 60.83
5 x 3.1 mm
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19.31 ct Oval Onyx, 25.2 x 18.2 mm From Sri Lanka, Photo A

19.31 ct Oval Onyx, 25.2 x 18.2 mm From Sri Lanka

Onyx

19.31ct1 pc
$ 38.62
25.2 x 18.2 mm
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1.31 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5.1 mm, Photo A

1.31 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5.1 mm

Pyrope Garnet

1.31ct total2 pcs
$ 10.09
5.2 x 5.1 mm
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1.15 ct Loose Cushion Cut Sapphire, 5.7 x 5.7 mm From Madagascar, Photo A

1.15 ct Loose Cushion Cut Sapphire, 5.7 x 5.7 mm From Madagascar

Sapphire

1.15ct1 pc
$ 115.00
5.7 x 5.7 mm
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1.02 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5 mm, Photo A

1.02 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5 mm

Hessonite Garnet

1.02ct1 pc
$ 18.81
6.9 x 5 mm
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14.36 ct Fancy Fire Agate, 18.7 x 15.7 mm From Mexico, Photo A

14.36 ct Fancy Fire Agate, 18.7 x 15.7 mm From Mexico

Fire Agate

14.36ct1 pc
$ 86.88
18.7 x 15.7 mm
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1.43 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 7.8 x 5.9 mm, Photo A

1.43 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 7.8 x 5.9 mm

Citrine

1.43ct1 pc
$ 9.44
7.8 x 5.9 mm
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2.28 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12.3 x 7.8 mm, Photo A

2.28 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12.3 x 7.8 mm

Pyrope Garnet

2.28ct1 pc
$ 5.74
12.3 x 7.8 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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