Charoite – 42 Grams – Russia
Approximate Size: 45x38x22mm
Approximate Weight: 42.2 Grams
Formula:(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
Acrylic base included
Locality: Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Russia
Purple charoite from the Murunskii Massif complex, Russia. This unique alkaline complex is renowned not only for its vivid charoite but also for rare radioactive minerals such as steacyite, rinkite, and occasionally eudialyte, which are sources of thorium and uranium, as well as potassium-bearing mineral species. The specimen’s mild radioactivity comes primarily from trace thorium- and uranium-bearing mineral inclusions, along with potassium-40 in the charoite itself (10.69% potassium by mass), which together can produce elevated Geiger counter readings
Geiger counter and coin not included
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