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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Pyrolusite from
Big Bullet Manganese claims (Big Bullett deposit; Big Bullett claims), Dos Palmas District, Orocopia Mts (Dos Palmas Mts), Riverside County, California, USA


Locality type:Claim
Classification
Species:Pyrolusite
Formula:Mn4+O2
Comments:Occurs in vugs of contorted quartzite.
Habit:Radiating aggregates
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Big Bullet Manganese claims (Big Bullett deposit; Big Bullett claims), Dos Palmas District, Orocopia Mts (Dos Palmas Mts), Riverside County, California, USA
Data Identifiers
Mindat Occurrence Record ID:649264
Long-form Identifier:1:3:649264:9
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
3.1km (1.9 miles) ⓘBox Canyon Mine (Shaver Well; North Star), Blake Hill, Mecca Hills, Riverside County, California, USA
82.9km (51.5 miles) ⓘBlack Ace Mine (Doran Mine; Black Ace claim; New Ace No. 1 claim), Packard Well, Palen Mountains, Riverside County, California, USA
89.3km (55.5 miles) ⓘBlack Widow Mine (Black Angus Mine; Angus No. 2), Thumb Peak, Palo Verde Mining District, Palo Verde Mountains, Imperial County, California, USA
91.4km (56.8 miles) ⓘGroce Mine (Parsons Mine; Black Strike claim; Black Strike deposit; Grosse Mine; Arlington Group Mines), Arlington Black Jack deposit (Arlington-Blackjack Mine; Blackjack Mine; Arlington Group Mines), McCoy Spring, Arlington District (Ironwood District), McCoy Mts (Ironwood Mts), Riverside County, California, USA
91.4km (56.8 miles) ⓘManganese Canyon Mine (Manganese Canyon group; Social Manganese Mine; Social Bray), Arlington Black Jack deposit (Arlington-Blackjack Mine; Blackjack Mine; Arlington Group Mines), McCoy Spring, Arlington District (Ironwood District), McCoy Mts (Ironwood Mts), Riverside County, California, USA
91.5km (56.9 miles) ⓘChocolate Drop group (Chocolate Drop claim; Black Queen claim; Black Jack claim; Big Bear claim; War Eagle; Black Point; Dixie Queen; Alaskan; McKinney; Tadpole; Big Bear; Chipmunk; Chipmunk and Laskin; Ebony Group; Chocolate Drop Mine), Thumb Peak, Palo Verde Mining District, Palo Verde Mountains, Imperial County, California, USA
91.9km (57.1 miles) ⓘArlington No. 3 deposit (Black Metal Mine; Arlington No. 3 claim), Arlington Black Jack deposit (Arlington-Blackjack Mine; Blackjack Mine; Arlington Group Mines), McCoy Spring, Arlington District (Ironwood District), McCoy Mts (Ironwood Mts), Riverside County, California, USA
92.0km (57.2 miles) ⓘBlack Jack Mine (Black Jack group), Arlington Black Jack deposit (Arlington-Blackjack Mine; Blackjack Mine; Arlington Group Mines), McCoy Spring, Arlington District (Ironwood District), McCoy Mts (Ironwood Mts), Riverside County, California, USA
93.6km (58.2 miles) ⓘGeorge claims (Red Rock claims), McCoy Spring, Arlington District (Ironwood District), McCoy Mts (Ironwood Mts), Riverside County, California, USA
95.6km (59.4 miles) ⓘBertha group, Midland, Little Maria Mountains, Riverside County, California, USA
References
Saul, R.B., Evans, J.R., and Gray, C.H. (1970) Mines and mineral resources of Riverside County. California Division of Mines and Geology County Report 9. Unpublished manuscript: 961
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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