STRONGER THAN STEEL

Class: Silicates
Subclass: Inosilicates
Group: Amphibole

Physical Characteristics:
Color is usually green,white, or gray.
Hardness is 5.5 - 6.
Specific Gravity is approximately 2.9 - 3.3 (very slightly above average for translucent minerals).
Streak is white.
Associated Minerals are quartz, lawsaonite, epidoteand glaucophane.