Bicchulite, Gehlenite
Small Cabinet, 8.5 x 7.3 x 3.9 cm
Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan
Bicchulite is a very rare calcium silicate and this very rich and showy specimen is from the Type Locality - the Fuka Mine of Japan. Sharp, gray, rectangular crystals to 4 mm of bicchulite pseudomorphs after gehlenite crystals richly cover the quartz-rich matrix on this specimen. Gehlenite is also a very rare calcium silicate. The Fuka Mine recovered high grade calcite for the toothpaste industry and is noted for interesting high temperature boron species.