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
Sulfur Spring (Sulphur Spring), Haddam, Middlesex County, Connecticut, USA


Locality type:Spring
Classification
Species:Melanterite
Formula:Fe2+(H2O)6(SO4) · H2O
Comments:Alteration of pyrite, pyrrhotite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Melanterite data
Locality Data:Click here to view Sulfur Spring (Sulphur Spring), Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:770755
Long-form Identifier:1:3:770755:1
GUID (UUID V4):0
Nearest other occurrences of Melanterite
2.6km (1.6 miles) ⓘState Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
8.1km (5.1 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
12.0km (7.5 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
12.2km (7.6 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
12.3km (7.6 miles) ⓘLinkpot cut, Airline Railroad, East Hampton, Middlesex County, Connecticut, USA
14.8km (9.2 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
18.8km (11.7 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
19.1km (11.9 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
52.0km (32.3 miles) ⓘThomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
62.2km (38.6 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
References
Williams, Horace S. (1899): Letter to Miss Eveline Brainerd of Haddam, February 18, 1899. Brainerd Public Library, Haddam, Connecticut.
 
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