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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Nailhead Spar

A variety of Calcite
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Formula:
CaCO3
A variety of calcite determined by a flat pyramidal termination of the prismatic crystals, resembling a nailhead.


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Unique IdentifiersHide

Mindat ID:
30430 (as Nailhead Spar)
859 (as Calcite)
Long-form identifier:
mindat:1:1:30430:0 (as Nailhead Spar)
mindat:1:1:859:4 (as Calcite)

Chemistry of Nailhead SparHide

Mindat Formula:
CaCO3
Element Weights:
Element% weight
O47.957 %
Ca40.043 %
C12.000 %

Calculated from ideal end-member formula.
Elements listed:
C, Ca, O - search for minerals with similar chemistry

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Nailhead SparHide

References for Nailhead SparHide

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