mineral
Charoite
K(Ca,Na)2Si4O10(OH,F) · nH2O
Hardness: 5-6 (Mohs scale), Color: Lavender to violet with white/black swirls, Luster: Vitreous to pearly, Crystal Structure: Monoclinic, Cleavage: Three directions (distinct/poor).
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Physical properties
Hardness: 5-6 (Mohs scale), Color: Lavender to violet with white/black swirls, Luster: Vitreous to pearly, Crystal Structure: Monoclinic, Cleavage: Three directions (distinct/poor).
Formation & geological history
Formed through contact metamorphism where alkali syenite intrusions interacted with limestone/dolomite deposits. It is found exclusively in the Murun Massif in the Sakha Republic, Siberia, Russia.
Uses & applications
Predominantly used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a prized collector specimen due to its rarity.
Geological facts
Charoite is one of the rarest minerals on Earth as it is only found in one specific location in Siberia. It was discovered in the 1940s but not scientifically described until 1978.
Field identification & locations
Identify by its unique swirling 'chatoyant' patterns of purple and lilac. In the field, look for its association with Tinaksite and Canasite. It is often found in large boulders in its type locality.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous