Aragonite

Kurohai village, Choshi city, Chiba pref., Japan

Field of view: 30 mm. Aragonite crystals. The radial group of pink prisms with a vitreous luster is aragonite. The massive black host is bronzite andesite with vesicules. Aragonite distributes in specific beds of andesite.

Recovered from a vesicule of a high-Mg andesite lava. Formed in the early Miocene (22 Ma).

Aragonite from this location was described in 1961.

Other localities

List of Japanese aragonite localities

Choshi (Andesite, Pink)
Onara (Serpentinite, Tabular)
Kanayamadani valley (Serpentinite, Tabular)
Shiraki (Serpentinite, Prismatic)
Yoshikawa Mine (Serpentinite, Fibrous)
Akatani Mine (Metasomatic Skarn, Prismatic)
Taguchi Mine (Bedded Mn, Acicular)