metamorphic
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
Hardness: 5-6 (Mohs scale); Color: Lavender, violet, purple with swirls of white, black, or tan; Luster: Vitreous to pearly, often chatoyant; Crystal structure: Monoclinic; Specific gravity: 2.54 - 2.58
- Hardness
- 5-6 (Mohs scale)
- Color
- Lavender, violet, purple with swirls of white, black, or tan
- Luster
- Vitreous to pearly, often chatoyant
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Physical properties
Hardness: 5-6 (Mohs scale); Color: Lavender, violet, purple with swirls of white, black, or tan; Luster: Vitreous to pearly, often chatoyant; Crystal structure: Monoclinic; Specific gravity: 2.54 - 2.58
Formation & geological history
Formed through contact metamorphism where alkali syenite intrusions interacted with limestone. It is found in the Sirenyy Kamen massif in Siberia, Russia. Geologically, it is linked to the Mesozoic era.
Uses & applications
Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a rare mineral specimen for collectors. It is prized for its unique violet color and chatoyancy.
Geological facts
Charoite is found in only one location in the world: the Chara River area in the Sakha Republic, Russia. It was first discovered in the 1940s but didn't become known to the Western world until 1978.
Field identification & locations
Identify by its unique swirling 'marbled' purple appearance and chatoyancy. In the field, look for distinct violet veins within host rock; it is not found anywhere outside the Chara River region of Siberia.
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