mineral

Charoite

K(Ca,Na)2Si4O10(OH,F)wH2O

Hardness: 5-6 (Mohs scale); Color: Bright lavender to deep violet/purple with swirling white, black, and orange inclusions; Luster: Vitreous to pearly/silky; Crystal Structure: Monoclinic; Cleavage: Good in three directions; Specific Gravity: 2.54-2.58.

Hardness: 5-6 (Mohs scale)
Luster: Vitreous to pearly/silky

Identified July 14, 2026More mineral →

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Physical properties

Formation & geological history

Formed through contact metamorphism where an alkali syenite intrusion entered limestone deposits, resulting in a unique hydrothermal chemical environment. It is exclusively found in the Murun Massif in Siberia, Russia, and is approximately 115-145 million years old.

Uses & applications

Primarily used as an ornamental stone for carvings, decorative objects, and cabochon jewelry. It is highly prized by collectors due to its rarity and unique chatoyancy.

Geological facts

Charoite was discovered in the 1940s but not described scientifically until 1978. It is named after the Chara River. It is one of the few minerals that is only found in a single location on the entire planet.

Field identification & locations

Identify by its distinctive 'swirling' or fibrous appearance and vivid purple hue. It often contains inclusions of orange Tinaksite or black Aegirine. Collectors should look for high-grade specimens with strong chatoyancy and minimal dull gray waste rock.