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While externally similar shapes, these two minerals are very different inside.
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Cryptomelane from
Reymert Mine, Reymert Canyon, Mineral Mountain Mining District, Pinal County, Arizona, USA


Locality type:Mine
Classification
Species:Cryptomelane
Formula:K(Mn74+Mn3+)O16
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cryptomelane data
Locality Data:Click here to view Reymert Mine, Reymert Canyon, Mineral Mountain Mining District, Pinal County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:484130
Long-form Identifier:1:3:484130:2
GUID (UUID V4):0
Nearest other occurrences of Cryptomelane
11.5km (7.1 miles) ⓘMagma Mine, Superior, Pinal County, Arizona, USA
56.7km (35.2 miles) ⓘNorth railway cut, Malpais Hill, Dudleyville, Pinal County, Arizona, USA
57.4km (35.7 miles) ⓘMiddle railway cut, Malpais Hill, Dudleyville, Pinal County, Arizona, USA
57.7km (35.9 miles) ⓘSouth railway cut, Malpais Hill, Dudleyville, Pinal County, Arizona, USA
References
Josef Vajdak (2002) Mineral News, 18, #1, 6. (Chet Lemanski specimens)
 
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