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Fuka mine, Fuka, Bicchu-cho (Bitchu-cho), Takahashi City, Okayama Prefecture, Chugoku Region, Honshu Island, Japan

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Latitude & Longitude (WGS84): 34° 46' 0'' North , 133° 25' 60'' East
Latitude & Longitude (decimal): 34.7666666667, 133.433333333
Name(s) in local language(s):布賀鉱山, 岡山県 高梁市 備中町布賀
Other regions containing this locality:Asia

Underground mine for very pure calcite which was used by a toothpaste company, among others. Interesting species are in high-temperature, boron-bearing, extremely low-Fe calc-silicate skarn between calcite limestone orebody and igneous intrusives (monzonite).

Collecting strictly prohibited to everyone except researchers associated with Okayama University.

Mineral List

81 valid minerals. 12 (TL) - type locality of valid minerals. 1 erroneous literature entry.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


- Mineralogical Journal of Japan (1977): 8, 374-381.
- Journal of the Mineralogical Society of Japan (1980): 14: 314-322.
- American Mineralogist (1986): 71: 1234-1239.
- Mineralogical Magazine (1995): 59: 549-552.
- Mineralogical Record (1996): 27: 303.
I. Kusachi, Y. Takechi, C. Henmi and S. Kobayashi (1998) Parasibirskite, a New Mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine 62:521-525.
- American Mineralogist (1999): 84: 686.
- Lapis 2002(11), 12.
Y. Takechi, I. Kusachi, Y. Nakamuta and K. Kase (2003) Talnakhite associated with andradite skarn at Fuka, Okayama Prefecture, Japan. Resource Geol., 53, 227-232.
Ohnishi, M., Kusachi, I., Kobayashi, S., Yamakawa, J., Tanabe, M., Kishi, S., & Yasuda, T. (2007). Numanoite, Ca4CuB4O6 (OH) 6 (CO3) 2, a new mineral species, the Cu analogue of borcarite from the Fuka mine, Okayama Prefecture, Japan. The Canadian Mineralogist, 45(2), 307-315.
- Tanaka, T., Minakawa, T., Kusachi, I. and Tanabe, M. (2009): Bi-bearing and REE-free zálesíite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 104, 164-167.
- Kusachi, I.; Kobayashi, S.; Takechi, Y.; Nakamuta, Y.; Nagase, T.; Yokoyama, K.; Momma, K.; Miyawaki, R.; Shigeoka, M.; Matsubara, S. (2013): Shimazakiite-4M and shimazakiite-4O, Ca2B2O5, two polytypes of a new mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine, 77, 93-10.

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