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Chemical formula
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Ca 2 (Mg,Fe,Al) 5 (Al,Si) 8 O 22 (OH) 2 |
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Crystalline System
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Monoclinic |
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Class
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Silicates |
| Origin | Almeria, Spain |
| Size |
Medium: 3.00-4.00 cm Large: 4.00-5.00 cm |
Hornblende massive in andesite.
The term hornblende is the informal name by which minerals from the “amphibole group” that have a color between black and dark green have traditionally been called.
It is usually found associated with igneous and metamorphic rocks.
The piece you receive may differ slightly from the photo shown, since the minerals are natural and no pieces are identical. The size is approximate.