Crystal Shape: Cubic Fluorite

Crystal Shape: Dodecahedron Garnet

Crystal Shape: Hexagonal Prism - Quartz

Crystal Shape: Octahedron Magnetite

One Cleavage PlaneTwo Cleavage Planes at right angles

Two Cleavage Planes not at right angles

Three Cleavage Planes at right angles Three Cleavage Planes not at right angles

Fracture

No well defined cleavage planes

Conchoidal Fracture

Physical Properties

Color and streak

Luster: Intensity of light reflected off a mineral Metallic, non-metallic- glassy (vitreous) and earthy (dull)

Physical Properties continued…

• Hardness: resistance to abrasion

• Mohs Scale (diagram below)

• Soft <2.5 fingernail will scratch mineral

• Hard >5.5 glass - mineral will scratch glass

• Medium 2.5 – 5.5 not scratched by fingernail and will not scratch glass

Other Properties

Taste

Reaction with acid

Specific Gravity The weight of a mineral compared to the same volume of water

Magnetism