＜ ＜ ＜Knowledge unit of Minerals ＞ ＞ ＞
Bournonite
Introduction
Physical Properties
Chemical Properties
Occurences
Notable Locality
Major Uses
Diagnostic Features

Physical Properties

Crystal System: Orthorhombic

Crystal Form: Colomun or plates

Habit:Plates or granular form

Hardness:2.5-3

Cleavage/Fracture:{010}

Cleavage: poor, shell shape to uneven

Luster:Metallic

Color:Steel gray to black

Steak: Steel gray to black

Specific Gravity:5.7-5.9

Other Characteristics:

(1)Usually in wheel shaped crystal form (twin crystals), with grooved surface

(2)Opaque

(3)Easy to melt

          

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