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Chemical formula
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Al 2 SiO 4 (F,OH) 2 |
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Crystalline system
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orthorhombic |
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Class
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oxides |
| Origin | Utah, United States |
| Size | 2.0-3.0cm |
Crystallized topaz with mica coating .
Topaz is an aluminosilicate that is usually found in pegmatites, rhyolite cavities and in hydrothermal veins. It forms well-developed crystals and is often used as a gem for jewelry making.
The mineral includes a label with the name and origin and is attached to a cardboard box. 4 cm square.
*The price is per unit (a single cardboard box of the four shown in the photo)
Since the minerals are natural, you will receive a piece similar to the one in the photograph. The minerals come in cardboard boxes and are glued to a porex base with hot silicone; these can be removed using ethyl alcohol without damaging the mineral. The size is approximate.