Chemical Formula: Pb(UO2)[SiO4]·H2O
Locality: Kasolo, Zaire.
Name Origin: Named after its locality.
Physical Properties
Cleavage: {001} Perfect, {100} Good, {010} Good
Color: Green, Gray green, Yellow, Yellow brown, Reddish orange.
Density: 5.96 – 6.5, Average = 6.23
Diaphaneity: Transparent to translucent
Fracture: Uneven – Flat surfaces (not cleavage) fractured in an uneven pattern.
Hardness: 4 – Fluorite
Luminescence: Radioactive.
Luster: Resinous – Greasy
Streak: light brownish yellow
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