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While externally similar shapes, these two minerals are very different inside.
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Marmatite from
Ryerson Hill Quarries, Paris, Oxford County, Maine, USA


Locality type:Quarry
Classification
Species:Sphalerite var: Marmatite
Formula:(Zn,Fe)S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Marmatite data
Locality Data:Click here to view Ryerson Hill Quarries, Paris, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:1599361
Long-form Identifier:1:3:1599361:6
GUID (UUID V4):0
Nearest other occurrences of Marmatite
55.0km (34.2 miles) ⓘEstes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
References
Lloyd Alexander CollectionIdentification: SEM-EDS
 
and/or  
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