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Boetonite

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A vein rock composed primarily of opal and chalcedony with some chromite, marcasite and locally magnesite. Found in ultrabasic rocks.


Classification of Boetonite

RockMetamorphic rockMetasomatic-rockBoetonite

Mineralogy of Boetonite

Essential minerals - these are minerals that are required within the classification of this rock:
Silica > ChalcedonySiO2
Silica > OpalSiO2 · nH2O
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
ChromiteFe2+Cr23+O4
MagnesiteMgCO3
MarcasiteFeS2

References for Boetonite

Reference List:
Fettes (et al.), Metamorphic Rocks - A Classification and Glossary of Terms (2007) Cambridge University Press

Internet Links for Boetonite

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https://www.mindat.org/min-51327.html
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