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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Marcasite from
Silver Harbour Mine (Beck Mine; Three A Mine; 3 A), MacGregor Township, Thunder Bay District, Ontario, Canada


Locality type:Mine
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Silver Harbour Mine (Beck Mine; Three A Mine; 3 A), MacGregor Township, Thunder Bay District, Ontario, Canada
Data Identifiers
Mindat Occurrence Record ID:655474
Long-form Identifier:1:3:655474:3
GUID (UUID V4):0
Nearest other occurrences of Marcasite
23.3km (14.5 miles) ⓘEmmons mine, McIntyre Township, Thunder Bay District, Ontario, Canada
24.7km (15.4 miles) ⓘSilver Islet mine, Silver Islet, Sibley Township, Thunder Bay District, Ontario, Canada
27.0km (16.8 miles) ⓘThunder Bay Amethyst Mine, McTavish Township, Thunder Bay District, Ontario, Canada
42.9km (26.6 miles) ⓘParsons Mine (Lily of the Valley Mine), Paipoonge Township, Thunder Bay District, Ontario, Canada
44.6km (27.7 miles) ⓘFederal Mine (Copeland's vein), Paipoonge Township, Thunder Bay District, Ontario, Canada
67.8km (42.1 miles) ⓘCrystal Lake Intrusion, Pardee Township, Thunder Bay District, Ontario, Canada
68.1km (42.3 miles) ⓘGreat Lakes Nickel prospect, Pardee Township, Thunder Bay District, Ontario, Canada
86.3km (53.6 miles) ⓘLac des Iles Complex, Lac des Iles Area, Thunder Bay District, Ontario, Canada
86.7km (53.9 miles) ⓘLac des Iles Mine, Lac des Iles Area, Thunder Bay District, Ontario, Canada
References
Vos, M. A., 1976, Amethyst Deposits of Ontario, Ontario Division of Mines, pp. 99..
 
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