Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Jacobsite from
Kiyokawa mine, Okutama-cho, Nishitama district, Tokyo Metropolis, Japan


Locality type:Mine
Classification
Species:Jacobsite
Formula:Mn2+Fe23+O4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Jacobsite data
Locality Data:Click here to view Kiyokawa mine, Okutama-cho, Nishitama district, Tokyo Metropolis, Japan
Data Identifiers
Mindat Occurrence Record ID:488353
Long-form Identifier:1:3:488353:1
GUID (UUID V4):0
References
加藤昭, & 松原聰. (1980). 本邦産マンガン硼酸塩鉱物. 鉱物学雜誌, 14(Special3), 86-97.
N. Aikawa (1987) Journal of Geosciences, Osaka City University, 30, 1-13.
 
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