mineral
Wollastonite
Wollastonite (CaSiO3)
AI-generated identification · may be incorrectHardness of 4.5 to 5 on the Mohs scale, typically white or gray with a vitreous to pearly luster. It exhibits a triclinic crystal system and good cleavage.
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Physical properties
Hardness of 4.5 to 5 on the Mohs scale, typically white or gray with a vitreous to pearly luster. It exhibits a triclinic crystal system and good cleavage.
Formation & geological history
Formed through the high-temperature metamorphism of siliceous limestones and dolostones via contact metasomatism.
Uses & applications
Used extensively in ceramics, polymers, paint, metallurgy, and friction products to improve thermal and mechanical properties.
Geological facts
Wollastonite is named after the English chemist and mineralogist William Hyde Wollaston. Its acicular crystals make it a valuable asbestos substitute.
Field identification & locations
Identified by its bladed or fibrous crystal habit, reactive nature with acid, and association with skarn deposits. Commonly found in locations like New York, USA, and various global contact metamorphic zones.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous