Identifying Minerals Color Streak Luster Density Hardness

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Presentation transcript:

Identifying Minerals Color Streak Luster Density Hardness Crystal Systems Cleavage & Fracture Special Properties

Color: Not mineral specific Gold Pyrite Chalcopyrite

Streak: The powdered form of a mineral

Luster: How minerals reflect light Metallic Non-metallic

Density Mass divided by volume Each mineral has a characteristic density.

Based on Moh’s scale of hardness

Crystal System (Pattern) Pattern of the shape a mineral takes if it can grow forever Mineral Java Applet

Cleavage & Fracture Cleavage: mineral splits easily along flat surfaces Fracture: mineral breaks apart in an irregular way Mica cleaves into thin, flat sheets that are almost transparent.

Special Properties Fluorescence Magnetism Reaction to acid

Identifying Minerals Color Luster (how light is reflected from a mineral’s surface – how shiny it is) (metallic or non-metallic) Hardness (using Mohs hardness scale, rate from 1 to 10) Streak (color of its powder)