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Spessartite

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Name:
Named after the Spessart region in southern Germany.
A lampropyre with plagioclase>K-feldspar and hornblende the dominant mafic mineral; no feldspathoid.

Not to be confused with spessartine garnet.


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Classification of SpessartiteHide

Sub-divisions of SpessartiteHide

Mineralogy of SpessartiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Feldspar > PlagioclaseA petrological term for Albite-Anorthite Series.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Feldspar > Alkali Feldspar > K FeldsparPotassium-dominant feldspars with unknown crystal symmetry and Al-Si ordering state.
MicaA petrological term for Mica Group.

Synonyms of SpessartiteHide

References for SpessartiteHide

Reference List:
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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press

Internet Links for SpessartiteHide

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https://www.mindat.org/min-50473.html
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