Mineral Identification Luster Metallic - Looks like a metal Nonmetallic

Mineral Identification Cleavage vs Fracture Fracture- mineral breaks randomly leaving jagged surface Cleavage - mineral breaks alone smooth flat surfaces or sheets (planes of weakness)

Cleavage

Fracture

Igneous Rocks 3 Primary Identification Characteristics Interlocking Crystals Vesicular Texture Glassy Texture

Large - Interlocking Crystals

Thin Section – Interlocking Crystals

Vesicular Texture

Glassy Texture

Metamorphic Rocks Foliation (Mineral Alignment) Primary Identification Characteristic Foliation (Mineral Alignment)

Phyllite sometimes contains garnet crystals, don’t confuse these with interlocking crystals.

Thin Section – Folation

Banding

3 Primary Identification Characteristics Sedimentary Rocks 3 Primary Identification Characteristics Contain Fossils Contain Sediments (Little rocks) Layered