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RM2069   Johannsenite with Axinite-(Mn) and Quartz

Iron Cap Mine, Santa Teresa Mts., Aravaipa, Graham Co., Arizona, United States

Johannsenite is a rare calcium and manganese silicate of the pyroxene group. In this specimen it appears forming aggregates of sharp prisms, with dark green color, accompanied by tabular lanceolate crystals of axinite-(Mn) of greenish tones and quartz crystals. A good-sized specimen of an unusual species.

Size: 7.2 x 5.8 x 5.5 cm.
Main crystal: 7 mm.