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Hornblenda

hornblende

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Chemical formula

Ca 2 (Mg,Fe,Al) 5 (Al,Si) 8 O 22 (OH) 2

Crystalline System
Monoclinic
Class
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.