Number 25

Color--------------------Olive green

Luster-------------------Nonmetallic, glassy to pearly

Streak-------------------None - White (harder than streak plate)

Hardness---------------6.5 - 7.0

Cleavage/--------------Cleavage, 2 cleavages at 90            Fracture                    degrees but hard to tell

S.G.-----------------------3.2 - 4.3

Special Properties------It is a common rock forming mineral

Formula-------------------(Mg,Fe)2SiO4

Mineral name------------Olivine

Family---------------------Silicates

Uses-----------------------Some olivine is used as a source of magnesium.

Olivine