Demantoid (Andradite)
Demantoid (Andradite)
Demantoid (Andradite)

Demantoid (Andradite)

€17,00

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SKU: B050
Antetezambato, Ambanja District, Diana Region, Madagascar
A few olive-green demantoids with good luster on a light matrix.
4.0 x 2.5 x 1.9 cm
16.3 g

Demantoid and Topazolite belong to the Garnet Supergroup, specifically to Andradite, and are thus an iron/calcium silicate with a cubic crystal structure. The green to olive-green crystals of Demantoid get their color from traces of chromium, while iron is responsible for the brown or yellow color of Topazolite. Mixed crystals exist in between. Andradites have a medium hardness (Mohs 6-7.5).