Presentation on theme: "Minerals and Mineral Identification By Mr. King. What is a mineral? Inorganic Inorganic Naturally occurring Naturally occurring Crystalline structure."— Presentation transcript:
What is a mineral? Inorganic Inorganic Naturally occurring Naturally occurring Crystalline structure Crystalline structure Chemical composition Chemical composition Distinct physical properties Distinct physical properties
Mineral properties Color Color Luster Luster Habit (Shape) Habit (Shape) Cleavage & Fracture Cleavage & Fracture Streak Streak Hardness Hardness Other Other
Luster: How minerals reflect light Non- metallic Metallic
Mineral Habit (Shape) Shape a mineral takes if grown unimpeded
Cleavage Cleavage is the breakage along planes that cut across weak bonds, thus cleavage in controlled by the minerals atomic structure EG: rhombohedral calcite
Fracture Fractures occur in minerals whose bond strengths are the same in all directions thus breakage doesnt follow a crystallographic direction, but follows an irregular surface. EG: conchodial fracture in quartz
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