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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Vitrophyric porphyry

A rock subtype
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A porphyry with phenocrysts in a glassy groundmass.

Any porphyritic igneous rock having a glassy groundmass. Adj: vitrophyric.

Synonym of: glass porphyry

Compare with: felsophyre, granophyre


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Unique IdentifiersHide

Mindat ID:
48441
Long-form identifier:
mindat:1:1:48441:1

Classification of Vitrophyric porphyryHide

Sub-divisions of Vitrophyric porphyryHide

Mineralogy of Vitrophyric porphyryHide

Essential minerals - these are minerals that are required within the classification of this rock:
GlassA non-crystalline, amorphous, relatively homogeneous solid material with a random liquid-like structure generally ...
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
FeldsparA petrological term for Feldspar Group.
MicaA petrological term for Mica Group.
Mica > BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Silica > QuartzSiO2

Synonyms of Vitrophyric porphyryHide

Other Language Names for Vitrophyric porphyryHide

German:Vitrophyr

Internet Links for Vitrophyric porphyryHide

References for Vitrophyric porphyryHide

Reference List:
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