A. Can be scratched by a fingernail Amphibole asbestos White Made up of 1-2½ slender, flexible fibers that can be pulled apart Cerargyrite Shiny white or Light greenish 1-1½ gray color; appears waxy; knife cuts it smoothly; turns violet brown to black when exposed to light Muscovite (white White Light colored; 2-2½ mica) splits into thin, flat, transparent sheets that will bend without breaking Sulfur White or pale Greenish; will 1½-2½ yellow burn with a blue flame; commonly found as crystals, crusts, or grains Talc White Light greenish 1 color; knife cuts it smoothly; feels soapy or greasy; splits into thin flakes B. Cannot be scratched by a fingernail but can be scratched by a copper penny Amphibole asbestos White Made up of 1-2½ slender, flexible fibers that can be pulled apart Biotite (black mica) White Dark green; 2½-3 splits into thin, flat, translucent sheets that will bend without breaking Calcite White Dilute 3