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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Quartz from
Perkins mine, Brooksville, Blue Hill - Castine Mining District, Hancock County, Maine, USA


Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Perkins mine, Brooksville, Blue Hill - Castine Mining District, Hancock County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:43289
Long-form Identifier:1:3:43289:2
GUID (UUID V4):0
Nearest other occurrences of Quartz
1.8km (1.1 miles) ⓘEmerson Mine, Castine, Blue Hill - Castine Mining District, Hancock County, Maine, USA
1.9km (1.2 miles) ⓘNorth Castine mine, Castine, Blue Hill - Castine Mining District, Hancock County, Maine, USA
2.3km (1.4 miles) ⓘJones Mine, Brooksville, Blue Hill - Castine Mining District, Hancock County, Maine, USA
3.0km (1.9 miles) ⓘHercules Mine, Penobscot, Hancock County, Maine, USA
3.9km (2.4 miles) ⓘTapley Mine, Brooksville, Blue Hill - Castine Mining District, Hancock County, Maine, USA
4.6km (2.9 miles) ⓘLimeburner prospect (Lymburner Prospect), Penobscot, Hancock County, Maine, USA
4.7km (2.9 miles) ⓘHighland Mine, Penobscot, Hancock County, Maine, USA
6.8km (4.2 miles) ⓘBlack Hawk Mine, Brooksville, Blue Hill - Castine Mining District, Hancock County, Maine, USA
7.3km (4.5 miles) ⓘCape Rosier Mine (Callahan Mine; Rosier Consolidated Mine), Brooksville, Blue Hill - Castine Mining District, Hancock County, Maine, USA
9.6km (6.0 miles) ⓘOwen Lead Prospect, Blue Hill, Blue Hill - Castine Mining District, Hancock County, Maine, USA
References
 
and/or  
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