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Quartz

Takaneyama Mine

Naka, Shimoda city, Shizuoka pref., Japan

Source for silicon

Quartz

Field of view: 50 mm. Radial groups of quartz. The radial groups of translucent white prisms are quartz grown on hexagonal prisms of quartz. The top of the specimen is covered with another quartz crust.

Recovered from a quartz vein in a moderate-temperature hydrothermal deposit associated with andesitic to basaltic pyroclastic rocks of an oceanic arc subjected to propylitization alteration. Formed in the late Miocene (7.5 Ma).

Quartz from this location was described in 1928.

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