ends 7. NONMETALLIC luster, GRAY color 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 Appears waxy; 1-1½ gray knife cuts it smoothly; turns violet brown to black when exposed to light Gypsum White Soft; occurs as 2 crystals or as fibrous, granular, compact, or earthy masses Sulfur White or pale Will burn with a 1½-2½ yellow blue flame; commonly found as crystals, crusts, or grains Talc White Knife cuts it 1 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 Anhydrite White Commonly occurs 3-3½ as sugary-looking masses Calcite White Dilute 3 hydrochloric acid fizzes on calcite; perfect cleavage in 3 directions gives rhomb-shaped