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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Geffroyit

A synonym of Geffroyite
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German name for:
This page provides mineralogical data about Geffroyit.


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Unique IdentifiersHide

Mindat ID:
14469 (as Geffroyit)
1667 (as Geffroyite)
Long-form identifier:
mindat:1:1:14469:2 (as Geffroyit)
mindat:1:1:1667:0 (as Geffroyite)

Similar NamesHide

JeffreyiteA valid IMA mineral species(Ca,Na)2(Be,Al)(Si2O7,HSi2O7)

Internet Links for GeffroyitHide

References for GeffroyitHide

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