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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Vicoite

A rock subtype
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Name:
Named for the Vico Volcano, Italy
A volcanic rock, close to the boundary between phonolitic tephrite and tephritic phonolite, largely composed of leucite, with lesser equal amounts of alkali feldspar and plagioclase and subordinate clinopyroxene.


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Unique IdentifiersHide

Mindat ID:
54596
Long-form identifier:
mindat:1:1:54596:1

Similar NamesHide

Fogoite-(Y)A valid IMA mineral speciesNa3Ca2Y2Ti(Si2O7)2OF3
VoggiteA valid IMA mineral speciesNa2Zr(PO4)(CO3)(OH) · 2H2O

Classification of VicoiteHide

Mineralogy of VicoiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Feldspathoid > LeuciteK(AlSi2O6)
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:

First Recorded Occurrence of VicoiteHide

Internet Links for VicoiteHide

References for VicoiteHide

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