mineral
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
AI-generated identification · may be incorrectHardness of 5.5 to 6.5 on the Mohs scale, vibrant purple to magenta color, vitreous to waxy luster, and hexagonal crystal system.
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Physical properties
Hardness of 5.5 to 6.5 on the Mohs scale, vibrant purple to magenta color, vitreous to waxy luster, and hexagonal crystal system.
Formation & geological history
Formed in manganese-rich metamorphic and igneous environments, primarily through metasomatism in intrusive alkaline rocks.
Uses & applications
Widely used as a gemstone in high-end jewelry, cabochons, and as a prized collector's mineral.
Geological facts
First discovered in 1944 by Japanese petrologist Ken-ichi Sugi, sugilite is celebrated for its intense, rich purple hues.
Field identification & locations
Identified by its distinctive purple coloration and association with manganese deposits; commonly sourced from South Africa and Japan.
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Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
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Limonite
FeO(OH)•nH2O
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Feldspar
Feldspar Group (Tectosilicate, e.g., KAlSi3O8)
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