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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Heliodor from
Black Russian No. 1 Quarry, Groton, Grafton County, New Hampshire, USA


04690850017272035991592.jpg
Heliodor

Black Russian No. 1 Quarry, Groton, Grafton County, New Hampshire, USA
04690850017272035991592.jpg
Heliodor

Black Russian No. 1 Quarry, Groton, Grafton County, New Hampshire, USA
04690850017272035991592.jpg
Heliodor

Black Russian No. 1 Quarry, Groton, Grafton County, New Hampshire, USA
Locality type:Quarry
Classification
Species:Beryl var: Heliodor
Formula:Be3Al2(Si6O18)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Heliodor data
Locality Data:Click here to view Black Russian No. 1 Quarry, Groton, Grafton County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:407683
Long-form Identifier:1:3:407683:4
GUID (UUID V4):0
References
L Frahm collection
 
and/or  
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