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
Black Diamond Mine group, Hidden Valley, U.S. Army Yuma Proving Grounds, Trigo Mountains Mining District (Cibola Mining District), La Paz County, Arizona, USA


Locality type:Mine
Classification
Species:Pyrolusite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Black Diamond Mine group, Hidden Valley, U.S. Army Yuma Proving Grounds, Trigo Mountains Mining District (Cibola Mining District), La Paz County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:173124
Long-form Identifier:1:3:173124:8
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
5.7km (3.5 miles) ⓘPeggy B Mine, Trigo Mountains Mining District (Cibola Mining District), La Paz County, Arizona, USA
12.2km (7.6 miles) ⓘClip Mine, Clip, Hidden Valley, Silver Mining District, La Paz County, Arizona, USA
14.4km (9.0 miles) ⓘDives Mine, Silver Mining District, La Paz County, Arizona, USA
16.2km (10.1 miles) ⓘRed Cloud Mine, Silver Mining District, La Paz County, Arizona, USA
16.6km (10.3 miles) ⓘTurtle prospect (Jet Black deposit; Hodges Manganese group; Hodges group of claims), Paymaster Landing, Paymaster Mining District, Chocolate Mountains, Imperial County, California, USA
17.2km (10.7 miles) ⓘMandan Mine, Silver Mining District, La Paz County, Arizona, USA
17.2km (10.7 miles) ⓘPacific Mine, Silver Mining District, La Paz County, Arizona, USA
17.2km (10.7 miles) ⓘPapago Mine, Black Rock Wash, Silver Mining District, La Paz County, Arizona, USA
17.5km (10.9 miles) ⓘBlack Rock Mine, Black Rock Wash, Silver Mining District, La Paz County, Arizona, USA
20.0km (12.4 miles) ⓘVirginia Dare deposit (E. J. Beutler Mining claims; E.J. Beutler claims; Valentine Nos. 1 and 2 claims; Virginia Dare Nos. 1 and 2 claims; Bundle of Sticks Nos. 1 and 2 claims), Midway Well, Paymaster Mining District, Chocolate Mountains, Imperial County, California, USA
References
Farnham & Stewart (1958): 80-81
(n.d.) ADMMR Mines Database, Arizona Geological Survey.
 
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