Andradite
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Andradite is a mineral species of the garnet group. It is a nesosilicate, with chemical formula Ca3Fe2Si3O12.
Single crystal (4.2 cm) – Diakon, Nioro du Sahel Circle, Kayes Region, Mali
Andradite garnet – Jiangxi, Nantan, China.
Black crystals of andradite: melanite
Colophonite
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Colophonite, less commonly kalophonit — an obsolete historical name for a brownish calcium-iron mineral of the garnet family, a variety of grossular, discovered as an associated metamorphic mineral in
Andradite
…Andradite includes four varieties: Colophonite: a historical variety found in the Scandinavian islands, brownish or reddish in color, often opaque or translucent. Demantoid: Vivid green in color…
Colophonite on wollastonite
Grossulars similar to colophonites
Hessonites (Liguria)