Introduction: “Charoite”, as a gem material, is a rock composed of the mineral species charoite, aegerine-augite, feldspar and tinaksite. It often has a fibrous appearance. Pictured above is a 5.32 ct oval cabochon.
Colors: semitranslucent to opaque, purple with swirls and spots of black, gray and white
Clarity: Charoite does not have a type classification for clarity. It is usually cut as cabochons, beads and carvings. Cracks should be avoided in finished pieces.
Stone Sizes: Large masses are available capable of pieces of more than 30 cm in size.
-Chary River area in the Murun Massif, Northwest Aldan, Yakutsk, Russia is the only source of the material. It was discovered in 1978.
-Refractive Index: 1.550-1.559 (+/- 0.002)
-Optic Character: AGG (aggregate)
-Specific Gravity: 2.68 (+0.10, -0.14) but varies with mineral content
-Hardness: 5 to 6
-Chemical Composition: (K,Na)5(Ca,Ba,Sr)8(Si6O15)2Si4O9(OH,F)-11H2O
-Cause of Color: unknown
-Fluorescence: inert to weak patchy red (LW; inert (SW)
-Absorption Spectra: not diagnostic
Name: Charoite is named after the source on the Chary River
Care: The ultrasonic should never be used and the steam cleaner is risky. Warm, soapy is safe.
To see available charoites, click here.