Identifying Rocks and Minerals
by Morgan Haynes
1. Streak Color
1.1. The color of the residue is the minerals streak, This can be found by dragging the mineral across a porcelain plate.
2. Cleavage/Fracture
2.1. Cleavage is the tendency of some minerals to break consistently and repeatedly in certain directions.
2.2. Minerals lacking cleavage altogether are said to exhibit fracture. The fracture surfaces may be described as CONCHOIDAL: smooth and curved with concentric ridges. or UNEVEN; rough and irregular.
2.3. Conchoidal
2.3.1. Uneven