Hokutolite (Anglesobarite)

Hokutolite is a variety of barytes of deposited Barite (BaSO4) by very acid hot springs. Generally it also contains minor strontium and minute traces of radium, marking a recent deposit. Hokutolite is mineral of very rare occurrence worldwide. It crystallizes precipitatedly from hot spring water of geothermal valley at Hokuto (Beitou). Hokutolite is the only one mineral named after a place of Taiwan.