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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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Kieselguhr

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Formula:
SiO2 · nH2O
German synonym of:
This page provides mineralogical data about Kieselguhr.


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Unique IdentifiersHide

Mindat ID:
9856 (as Kieselguhr)
9855 (as Diatomaceous Earth)
Long-form identifier:
mindat:1:1:9856:0 (as Kieselguhr)
mindat:1:1:9855:3 (as Diatomaceous Earth)

Similar NamesHide

KieselgurA synonymSiO2 · nH2O

Internet Links for KieselguhrHide

References for KieselguhrHide

Reference List:
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