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M07-How to Use Fracture and Cleavage for Mineral Identification

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M06-How to Use Color for Mineral Identification

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A test showing when dilute acid (HCL) is placed on a mineral, it may bubble

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An irregular or uneven break
Tends to lack preferred zones of weakness

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The tendency of a mineral to break along weak areas and form semi-smooth or parallel surfaces

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Resistance of a mineral to being scratched
MOHS HARDNESS SCALE is used to classify hardness

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The ratio of mass to volume of an object

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The shine of an unweathered mineral; the way it looks reflected in light
METALLIC LUSTER: shines like stainless steel (metal)
NONMETALLIC LUSTER: earthy or dull shine

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The color of a finely-crushed powder when a mineral is dragged across a streak plate.

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Color is a visual attribute of an object based on perception.
It is one of the most obvious, but not the most reliable because many of the 4,000 known minerals share similar colors.