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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Olivine-gabbro

A rock classification type
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A gabbroid with >5% olivine and >5% pyroxene


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Unique IdentifiersHide

Mindat ID:
48281
Long-form identifier:
mindat:1:1:48281:1

Classification of Olivine-gabbroHide

QAPF_P_10.png

Gabbro is in section 10 of the QAPF diagram.

Sub-divisions of Olivine-gabbroHide

Mineralogy of Olivine-gabbroHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
OlivineCommonly used as a synonym for a member of the Fayalite-Forsterite Series, but more generally and properly ...
PyroxeneA petrological term for Pyroxene Group.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Mica > BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Other Language Names for Olivine-gabbroHide

Internet Links for Olivine-gabbroHide

References for Olivine-gabbroHide

Reference List:
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