Asbestos
Asbestos is a naturally occurring fibrous silicate mineral. There are six types, all of which are composed of long and thin fibrous crystals, each fibre being composed of many microscopic "fibrils" that can be released into the atmosphere by... Wikipedia
Cleavage: Prismatic
Color: Green, red, yellow, white, gray, blue
Crystal habit: Amorphous, granular, massive
Crystal system: Orthorhombic, monoclinic
Dana classification: 71.01.02d.03
Extinction: Parallel or oblique
Formula mass: 277.11 g