Gold

Field of view: 30 mm. Gold associated with silver in a quartz vein. The pale brown bed is rich in gold. The black dots are Ag-bearing sulfides. The opaque white parts are aggregate of quartz and adularia. The bottom edge of the specimen is the boundary between the quartz vein and the host.

Recovered from a gold-bearing quartz vein in a low-temperature hydrothermal Au-Ag deposit. Formed in the early Pleistocene (1.0 Ma).

Gold-bearing quartz vein from this location was described in 1961, and was designated the prefectural mineral of Kagoshima in 2016 by the Geological Society of Japan.