Chapter 4 - Minerals.

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Presentation transcript:

Chapter 4 - Minerals

Mineral - definition Naturally occurring Inorganic Solid Specific chemical composition Definite crystalline structure

Mineral Systems If space is not restricted, a mineral will exhibit a crystal pattern with a definite number of sides and specific angles.

Mineral Identification Hardness – the ability to resist scratching; ranges from 1 (softest) to 10 (hardest)

Mineral Identification Streak _________ – the color of the powdered form of a mineral

Mineral Identification _________– the way a mineral reflects light In our class we will use three terms: _______– not reflecting light well _______ – reflects like water or glass ________– reflects like a metal Luster dull glassy metallic

Mineral Identification Cleavage (flat surfaces) or Fracture (no flat surfaces) – the way a mineral __________ breaks

Review color luster texture streak hardness cleavage fracture specific gravity