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Acanthite

Date Mine

Kimonbetsu village, Date city, Iburi branch, Hokkaido, Japan

Source for Silver

Acanthite

Field of view: 2 mm. Acanthite associated with quartz. The black grain with a metallic luster at the right is acanthite. The surrounding white host is gangue quartz. The opaque white parts are fine quartz crystals, and the transparent parts are larger crystals. The brown part is a limonite crust.

Recovered from a quartz vein of a hydrothermal Au-Ag deposit associated with andesitic-dacitic tuff breccia, eruption products of a submarine caldera. Formed in the late Miocene (10 Ma).

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