metamorphic

Tumbled purple stone, likely charoite

Charoite, a complex potassium-calcium silicate mineral (commonly approximated as (K,Sr,Ba,Mn)₁₅–₁₆(Ca,Na)₃₂Si₇₀O₁₈₀(OH,F)₄·nH₂O)

AI-generated identification · may be incorrect

The polished purple-and-white swirling pattern is consistent with charoite, though the image alone cannot confirm the identification. Charoite has Mohs hardness about 5–6, silky to vitreous luster, and a complex monoclinic crystal structure.

Identified September 29, 2026More metamorphic →

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Physical properties

Formation & geological history

Charoite forms through metasomatic alteration of rocks in alkaline igneous settings; known deposits are geologically associated with the Siberian alkaline complexes, roughly 140–150 million years old.

Uses & applications

Used mainly for cabochons, beads, carvings, and collectible polished specimens; it has little large-scale industrial or construction use.

Geological facts

Charoite is exceptionally localized and is named for the Chara River region of Siberia.

Field identification & locations

Look for distinctive violet swirls with white, dark, or orange inclusions and a silky sheen; the only significant commercial source is the Murun Massif in Sakha, Russia. A small tumbled piece like this typically sells for about $5–$25, depending on color and pattern.