Cassiterite: Buy Loose Cassiterite at Affordable Prices from GemSelect

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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Gemstones A-Z

Buy Cassiterite Gems

3.16 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gems, 5.1 x 3.1 mm

4.12 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 14.2 x 8.2 mm

1.48 carat Baguette Facet Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gems, 3.2 x 2.1 mm

1 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 4.8 x 3.9 mm

6.4 carat Sky Blue Topaz, Round loose Topaz from Brazil, Natural Gems, 9.2 mm

3.95 ct Black Star Sapphire, 9.8 x 7.7 mm Oval Cut From Thailand

1.61 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 4.4 x 3.6 mm

3.69 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 12.1 x 10.1 mm

1.85 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.1 x 7 mm

0.82 ct Oval Cut Kornerupine, 7.4 x 5.5 mm From Sri Lanka

3 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.2 x 9.1 mm

26.11 ct Pencil Cut Tiger's Eye, 37 x 10 mm From Thailand

0.93 ct Oval Chrysoberyl Cat's Eye, 6.4 x 4.5 mm From Sri Lanka

3.17 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.8 x 8.8 mm

2.82 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 14.4 x 9.9 mm

1.33 ct Purple Spinel, 6.7 x 6.2 mm Cushion Cut From Tanzania

4.62 carat Green Fluorite, Oval loose Fluorite from India, Natural Untreated Gem, 11.1 x 9.3 mm

0.52 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 5.9 x 4 mm

1.38 ct Green Sphene, 6.8 x 6.3 mm Oval Cut From Sri Lanka

31.61 ct Cushion Jasper, 24.6 x 21.8 mm From Indonesia

7.24 ct Round Rutile Quartz, 10.1 mm From India

2.64 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.8 x 3.8 mm

1.31 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gem, 7.2 mm

28.19 ct Oval Fossil Coral, 22.1 x 13.8 mm From Indonesia

105.24 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 37.4 x 26.9 mm

1.32 ct Blue Kyanite, 6.7 mm Round Cut From Nepal

8.04 ct Flower Cut Rose Quartz, 12.7 x 12.4 mm From South Africa

1.15 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gems, 6.2 x 6 mm

10.14 ct Round Quartz Cat's Eye, 12.8 mm From India

6.61 ct Round Rutile Quartz, 11.1 mm From India

1.04 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gem, 7 x 5.1 mm

7.84 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 12.9 mm

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