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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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simonyite

A synonym of Blödite
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Formula:
Na2Mg(SO4)2 · 4H2O
Synonym:
A synonym of Blödite
This page provides mineralogical data about simonyite.


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Unique IdentifiersHide

Mindat ID:
471253 (as simonyite)
695 (as Blödite)
Long-form identifier:
mindat:1:1:471253:0 (as simonyite)
mindat:1:1:695:8 (as Blödite)

Similar NamesHide

SimoniteA valid IMA mineral speciesTlHgAs3S6

Internet Links for simonyiteHide

References for simonyiteHide

Reference List:
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