Tremolite (Silicate-Double Chain Silicate)Ca2Mg5Si8O22(OH)2
Hardness: 5.0 - 6.0
Specific Gravity: 3.0 - 3.3
Characteristics: Amphibole; usually white; vitreous luster; two perfect prismatic cleavage; uneven fracture; translucent to nearly opaque; forms complete solid solution with ferroactinolite; insoluble in most acids.
Found in dolomitic marbles; schists (often associated with talc); serpentines.
Some uses of tremolite are in ceramic clays, sand, talc, and floor tiles.
(Primary text: Perkins, D. 2002. Mineralogy. Prentice Hall.)