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Shiromaru mine (Hakumaru mine), Okutama-cho, Nishi-Tama-gun, Tokyo Prefecture, Kanto Region, Honshu Island, Japan

Photo: aca
Low-grade manganese ore in metamorphosed sediments. Outcrops are now under the waters of a reservoir. ("Hakumaru" is a misnomer for this locality.)

Mineral List

Aegirine
Alleghanyite
Andradite
Banalsite
Benitoite
Birnessite
Braunite
Calcite
Celsian
'Chert'
Copper
Cryptomelane
Cymrite
Edingtonite
Eggletonite
Gamagarite
Ganophyllite
Grossular
var: Manganoan Grossular

Harmotome
'Hyalophane'
Marsturite
Orthoclase
var: Barian Orthoclase

Piemontite-(Sr)
Rhodochrosite
Rhodonite
Strontianite
Tamaite (TL)
Tephroite
Tinzenite
Tokyoite (TL)


30 entries listed. 26 valid minerals. 2 type localities (valid minerals).

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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