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7.16 carat Oval Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12.9 x 9.5 mm, Photo A

7.16 carat Oval Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 12.9 x 9.5 mm

Pyrope Garnet

7.16ct1 pc
$ 85.92
12.9 x 9.5 mm
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0.34 ct Loose Orange Sapphire, 5.1 x 2.6 mm Marquise Cut From Tanzania, Photo A

0.34 ct Loose Orange Sapphire, 5.1 x 2.6 mm Marquise Cut From Tanzania

Sapphire

0.34ct total2 pcs
$ 23.39
5.1 x 2.6 mm
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15.18 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 24.2 x 18.3 mm, Photo A
Ammolite Product Video (451545)

15.18 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 24.2 x 18.3 mm

Ammolite

15.18ct1 pc
$ 166.98
24.2 x 18.3 mm
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2.33 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.2 x 6.2 mm, Photo A

2.33 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.2 x 6.2 mm

Hessonite Garnet

2.33ct1 pc
$ 46.60
8.2 x 6.2 mm
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1.62 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5.1 mm, Photo A

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

Pyrope Garnet

1.62ct total2 pcs
$ 12.47
5.1 x 5.1 mm
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7.41 ct Oval Strawberry Quartz, 15.3 x 11.5 mm From Russia, Photo A

7.41 ct Oval Strawberry Quartz, 15.3 x 11.5 mm From Russia

Strawberry Quartz

7.41ct1 pc
$ 46.78
15.3 x 11.5 mm
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4.21 ct Orange Sunstone, 11.1 mm Round Cut From India, Photo A

4.21 ct Orange Sunstone, 11.1 mm Round Cut From India

Sunstone

4.21ct1 pc
$ 46.31
11.1 mm
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1.15 carat Pear Shape Chrysoberyl, loose Certified Chrysoberyl from Sri Lanka, Natural Untreated Gem, 8.6 x 5.7 mm, Photo A

1.15 carat Pear Shape Chrysoberyl, loose Certified Chrysoberyl from Sri Lanka, Natural Untreated Gem, 8.6 x 5.7 mm

Chrysoberyl

1.15ct1 pc
$ 134.56
8.6 x 5.7 mm
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0.94 ct Loose White Sapphire, 4.6 mm Diamond Cut From Madagascar, Photo A

0.94 ct Loose White Sapphire, 4.6 mm Diamond Cut From Madagascar

Sapphire

0.94ct total2 pcs
$ 124.49
4.6 mm
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1.72 ct Multicolor Mystic Quartz, 8.2 mm Round Concave Cut From Brazil, Photo A

1.72 ct Multicolor Mystic Quartz, 8.2 mm Round Concave Cut From Brazil

Mystic Quartz

1.72ct1 pc
$ 5.16
8.2 mm
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1.76 carat Carved Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 12.1 x 6.1 mm, Photo A

1.76 carat Carved Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 12.1 x 6.1 mm

Amethyst

1.76ct1 pc
$ 12.32
12.1 x 6.1 mm
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32.3 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 33.4 x 19.8 mm, Photo A

32.3 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 33.4 x 19.8 mm

Jasper

32.30ct1 pc
$ 35.53
33.4 x 19.8 mm
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0.42 carat Blue Sapphire, Round Cabochon loose Sapphire from Tanzania, Natural Gem, 4.2 mm, Photo A

0.42 carat Blue Sapphire, Round Cabochon loose Sapphire from Tanzania, Natural Gem, 4.2 mm

Sapphire

0.42ct1 pc
$ 11.34
4.2 mm
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1.06 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Madagascar, Natural Untreated Gems, 4.2 x 4.1 mm, Photo A

1.06 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Madagascar, Natural Untreated Gems, 4.2 x 4.1 mm

Pyrope Garnet

1.06ct total2 pcs
$ 5.30
4.2 x 4.1 mm
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0.92 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gems, 4.9 x 4.9 mm, Photo A

0.92 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from the United States, Natural Untreated Gems, 4.9 x 4.9 mm

Pyrope Garnet

0.92ct total2 pcs
$ 7.36
4.9 x 4.9 mm
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4.28 carat Sky Blue Topaz, Princess-Cut loose Topaz from Brazil, Natural Gems, 7 x 7 mm, Photo A

4.28 carat Sky Blue Topaz, Princess-Cut loose Topaz from Brazil, Natural Gems, 7 x 7 mm

Topaz

4.28ct total2 pcs
$ 32.96
7 x 7 mm
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0.52 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gems, 4.2 mm, Photo A

0.52 carat Blue Kyanite, Round loose Kyanite from Nepal, Natural Untreated Gems, 4.2 mm

Kyanite

0.52ct total2 pcs
$ 13.00
4.2 mm
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0.62 ct Oval Checkerboard Peridot, 6.1 x 4.1 mm From China, Photo A

0.62 ct Oval Checkerboard Peridot, 6.1 x 4.1 mm From China

Peridot

0.62ct1 pc
$ 11.16
6.1 x 4.1 mm
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7.49 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13 mm, Photo A

7.49 carat Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13 mm

Amethyst

7.49ct1 pc
$ 49.43
13 mm
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1.77 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 8.1 x 6.2 mm, Photo A

1.77 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 8.1 x 6.2 mm

Ruby

1.77ct1 pc
$ 47.89
8.1 x 6.2 mm
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4.77 ct Rainbow Pyrite, 17 x 12.5 mm From Russia, Photo A

4.77 ct Rainbow Pyrite, 17 x 12.5 mm From Russia

Rainbow Pyrite

4.77ct1 pc
$ 16.84
17 x 12.5 mm
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8.02 ct Brown Moonstone, 15.2 x 9.6 mm Oval Cut From India, Photo A

8.02 ct Brown Moonstone, 15.2 x 9.6 mm Oval Cut From India

Moonstone

8.02ct1 pc
$ 17.38
15.2 x 9.6 mm
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0.37 ct Loose Pink Sapphire, 5.7 x 3.9 mm Oval Cut From Madagascar, Photo A

0.37 ct Loose Pink Sapphire, 5.7 x 3.9 mm Oval Cut From Madagascar

Sapphire

0.37ct1 pc
$ 35.04
5.7 x 3.9 mm
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0.8 ct Loose Yellow Citrine, 10 x 4.1 mm Oval Buff Top From Brazil, Photo A

0.8 ct Loose Yellow Citrine, 10 x 4.1 mm Oval Buff Top From Brazil

Citrine

0.80ct1 pc
$ 5.60
10 x 4.1 mm
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4.1 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5.1 mm, Photo A

4.1 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5.1 mm

Zircon

4.10ct total4 pcs
$ 24.57
7 x 5.1 mm
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1.43 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 18.6 x 3.5 mm, Photo A

1.43 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 18.6 x 3.5 mm

Tourmaline

1.43ct1 pc
$ 37.75
18.6 x 3.5 mm
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8.42 carat Swiss Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 10.2 x 9.9 mm, Photo A

8.42 carat Swiss Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 10.2 x 9.9 mm

Topaz

8.42ct total2 pcs
$ 60.20
10.2 x 9.9 mm
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0.42 ct Loose White Sapphire, 4.4 mm Diamond Cut From Madagascar, Photo A

0.42 ct Loose White Sapphire, 4.4 mm Diamond Cut From Madagascar

Sapphire

0.42ct1 pc
$ 55.62
4.4 mm
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5.68 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.2 x 8.1 mm, Photo A

5.68 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.2 x 8.1 mm

Citrine

5.68ct total2 pcs
$ 31.24
10.2 x 8.1 mm
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0.53 ct Loose Yellow Sapphire, 6 x 5.2 mm Oval Cut From Tanzania, Photo A

0.53 ct Loose Yellow Sapphire, 6 x 5.2 mm Oval Cut From Tanzania

Sapphire

0.53ct1 pc
$ 59.35
6 x 5.2 mm
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0.79 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6.2 x 6.1 mm, Photo A

0.79 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6.2 x 6.1 mm

Citrine

0.79ct1 pc
$ 5.53
6.2 x 6.1 mm
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3.09 carat Green Sphene, Pear Shape loose Sphene from Sri Lanka, Natural Untreated Gem, 10.5 x 8.1 mm, Photo A
Sphene Product Video (413839)

3.09 carat Green Sphene, Pear Shape loose Sphene from Sri Lanka, Natural Untreated Gem, 10.5 x 8.1 mm

Sphene

3.09ct1 pc
$ 339.90
10.5 x 8.1 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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