Kasolite & Metatorbernite - Musonoi Mine, Kolwezi, Lualaba, DR Congo

Pb(UO₂)(SiO₄) · H₂O        Cu(UO₂)₂(PO₄)₂ · 8H₂O

The Musonoi Mine in the Democratic Republic of the Congo is a world-famous locality for its rich deposits of uranium and copper minerals, including the striking secondary uranium minerals kasolite and metatorbernite. Kasolite, a lead uranium silicate, is typically found as bright orange, reddish-brown, or yellowish prismatic crystals or granular aggregates. This mineral forms through the alteration of primary uranium ores like uraninite in oxidizing conditions, often associated with copper-bearing rocks. Kasolite specimens from the Musonoi Mine are highly sought after by collectors for their vivid colors and well-defined crystal formations, which provide a glimpse into the geochemical processes that shaped this renowned deposit.

Metatorbernite, a vibrant green secondary uranium phosphate mineral, also occurs abundantly at Musonoi. It forms as tabular or micaceous crystals, often radiating in clusters or lining fractures within the host rock. Derived from the alteration of primary uranium minerals, metatorbernite develops under similar oxidizing conditions as kasolite and frequently coexists with it, creating visually striking mineralogical associations. The Musonoi Mine's metatorbernite is prized not only for its aesthetic appeal but also for its significance in understanding uranium-phosphate geochemistry in copper-rich environments. Together, kasolite and metatorbernite represent the dynamic mineralogical and geochemical history of the Musonoi Mine, cementing its reputation as one of the premier uranium-mineral localities in the world.

Approx. activity on an SE International Ranger EXP: 2400 cpm

Approx. size: 17mm x 15mm x 11mm