1. Mineral Identification
Luster
Metallic - Looks like a metal Nonmetallic

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

3. Cleavage

9. Fracture

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

13. Large - Interlocking Crystals

18. Thin Section – Interlocking Crystals

20. Vesicular Texture

25. Glassy Texture

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

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

38. Thin Section – Folation

40. Banding

47. 3 Primary Identification Characteristics
Sedimentary Rocks
3 Primary Identification Characteristics
Contain Fossils
Contain Sediments (Little rocks)
Layered