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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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Arkosic sand

A rock subtype
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A sand rich in feldspar generally formed from weathering of feldspar-rich igneous or metamorphic rocks (usually granite) in an environment where the feldspar does not undergo significant chemical weathering and decomposition.


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Unique IdentifiersHide

Mindat ID:
49103
Long-form identifier:
mindat:1:1:49103:1

Classification of Arkosic sandHide

Mineralogy of Arkosic sandHide

Essential minerals - these are minerals that are required within the classification of this rock:
FeldsparA petrological term for Feldspar Group.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
CalciteCaCO3
MicaA petrological term for Mica Group.

Internet Links for Arkosic sandHide

References for Arkosic sandHide

Reference List:
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