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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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Pseudogymnite

A synonym of 'Deweylite'
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Formula:
Mg4Si3O10 · 6H2O ?
Synonym:
A synonym of Deweylite
This page provides mineralogical data about Pseudogymnite.


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Unique IdentifiersHide

Mindat ID:
11166 (as Pseudogymnite)
1272 (as Deweylite)
Long-form identifier:
mindat:1:1:11166:7 (as Pseudogymnite)
mindat:1:1:1272:6 (as Deweylite)

Internet Links for PseudogymniteHide

References for PseudogymniteHide

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