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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Melanterite from
Cranston Graphite mine, Cranston, Providence County, Rhode Island, USA


Locality type:Mine
Classification
Species:Melanterite
Formula:Fe2+(H2O)6(SO4) · H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Melanterite data
Locality Data:Click here to view Cranston Graphite mine, Cranston, Providence County, Rhode Island, USA
Data Identifiers
Mindat Occurrence Record ID:149484
Long-form Identifier:1:3:149484:6
GUID (UUID V4):0
Nearest other occurrences of Melanterite
18.8km (11.7 miles) ⓘLynch Quarry, Berkeley, Cumberland, Providence County, Rhode Island, USA
87.5km (54.4 miles) ⓘLinkpot cut, Airline Railroad, East Hampton, Middlesex County, Connecticut, USA
87.9km (54.6 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
91.1km (56.6 miles) ⓘRobin's Hill copperas mine, Chelmsford, Middlesex County, Massachusetts, USA
92.9km (57.7 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
93.2km (57.9 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
94.2km (58.5 miles) ⓘSulfur Spring (Sulphur Spring), Haddam, Middlesex County, Connecticut, USA
95.1km (59.1 miles) ⓘState Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
95.7km (59.4 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
95.8km (59.5 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
References
Rocks & Min.: 20:464.
 
and/or  
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