OPAL FROM HOSAKA, FUKUSHIMA PREFECTURE, JAPAN

• Published in: Ganseki kōbutsu kōshō gakkaishi Vol. 68; no. 10; pp. 295 - 302
• Main Authors: Tsutsumi, Sadao, Sakamoto, Takabumi
• Format: Journal Article
• Language: English
• Published: Japan Association of Mineralogical Sciences 1973

It is well known that opal occurs from Hosaka, Fukushima Pref., northeastern Japan. The opal is found as crusts of cauliflower-like nodular masses and patchy areas in a plagioliparite or pearlite. Commonly it is milky white or bluish white in colour and rarely shows a colour play of precious opal. T...