Orthoclase
Hirukawa
Nakatsugawa city, Gifu pref., Japan
This locality is closed to collectors.
Field of view: 50 mm. Euhedral crystals of orthoclase. The opaque white prisms are orthoclase. The translucent gray parts are quartz. The brown parts are thin crusts of limonite.
Recovered from a pocket of a Topaz-NYF pegmatite associated with S-type (Ilmenite-series) granite. Formed in the Late Cretaceous (67 Ma).
Orthoclase from this location was described in 1895.