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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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Glacies Mariæ

A synonym of 'Selenite'
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Formula:
CaSO4 · 2H2O
Synonym:
A synonym of Selenite
This page provides mineralogical data about Glacies Mariæ.


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Name EncodingHide

ASCII-7:
Glacies Mariae

Unique IdentifiersHide

Mindat ID:
31674 (as Glacies Mariæ)
5527 (as Selenite)
1784 (as Gypsum)
Long-form identifier:
mindat:1:1:31674:9 (as Glacies Mariæ)
mindat:1:1:5527:3 (as Selenite)
mindat:1:1:1784:4 (as Gypsum)

Internet Links for Glacies MariæHide

References for Glacies MariæHide

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