THORITE

(Th, U)SiO4
Thorium Uranium Silicate
(also known as Orangite)

 Cleavage: poor, in two directions lengthwise, but is rarely seen

 Colour: black, but also brownish black, orange, yellowish-orange and dark green

 Fracture: conchoidal

 Hardness: 4.5 - 5

 Luster: resinous

 Streak: orange to brown

 Possible Useage: minor ore of thorium and uranium, mineral specimen

 More Info: Mineral Gallery, Mineralogy Database