Chapter 4 - MineralsChapter 4 - Minerals

Mineral - definitionMineral - definition

Naturally occurringNaturally occurring InorganicInorganic SolidSolid Specific chemical compositionSpecific chemical composition Definite crystalline structureDefinite crystalline structure

Mineral SystemsMineral Systems

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

Mineral IdentificationMineral Identification Hardness – the ability to resist scratching; Hardness – the ability to resist scratching;

ranges from 1 (softest) to 10 (hardest)ranges from 1 (softest) to 10 (hardest)

Mineral IdentificationMineral Identification

_________ – the _________ – the color of the color of the powdered form powdered form of a mineralof a mineral

Streak

Mineral IdentificationMineral Identification

_________– the way a mineral reflects _________– the way a mineral reflects lightlight

In our class we will use three terms:In our class we will use three terms: _______– not reflecting light well_______– not reflecting light well

_______ – reflects like water or glass_______ – reflects like water or glass ________– reflects like a metal________– reflects like a metal

Luster

dull

glassy

metallic

Mineral IdentificationMineral Identification

Cleavage (flat surfaces) or Fracture (no flat Cleavage (flat surfaces) or Fracture (no flat surfaces) – the way a mineral __________surfaces) – the way a mineral __________breaks

ReviewReview