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Mineral Identification

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Presentation on theme: "Mineral Identification"— Presentation transcript:

1 Mineral Identification
Chapter 5 Mineral Identification

2 Physical Properties Properties that can be measured.
Ex) color, texture, shape, density

3 Physical Properties of a Mineral
Hardness A measure of how easily a mineral can be scratched Soft mineral: Talc Hard mineral: Diamond

4 Moh’s Scale of Hardness

5 Luster The way a mineral reflects light
Can be metallic or non-metallic

6 Streak The color of a mineral in powdered form
The mineral is rubbed across an unglazed porcelain tile (streak plate) Only works for minerals that are softer than the streak plate

7 Cleavage Minerals that break along smooth flat surfaces

8 Fracture Minerals that break along uneven, rough or jagged edges

9 Color Good starting indicator but not good when used by itself

10 Other Properties Some minerals have special properties Magnetite-
attracted to magnets Calcite- produces a double image fizzes when HCl is applied

11 Other Properties Fluorescence Phosphorescence
Glow when viewed under ultraviolet light Examples: fluorite, calcite Phosphorescence Will continue to glow even after the ultraviolet light is removed Examples: sphalerite, Willemite

12 Other Properties Radiation
Give off subatomic particles that can be detected by a Geiger counter Exposure is dangerous to living organisms Examples: carnotite, uraninite

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