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
Molybdenite locality, Essex, Middlesex County, Connecticut, USA


Classification
Species:Quartz
Formula:SiO2
Comments:A vein traversing gneiss and hosting molybdenite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Molybdenite locality, Essex, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:765676
Long-form Identifier:1:3:765676:7
GUID (UUID V4):0
References
Robinson, Samuel (1825) A Catalogue of American Minerals, With Their Localities - Including All Which Are Known to Exist in the United States and British Provinces, And Having the Towns, Counties, and Districts in Each State and Province Arranged Alphabetically. With an Appendix, Containing Additional Localities and a Tabular View. Cummings, Hilliard, & Co.
 
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