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quartz
symmetrical
mica
shiny thin layer
calcite
very common, similar to halite. clear, in crystal structure, columns
halite
common, similar to calcite. salty
feldspar
angular, not right angles
olivine
green, more pure green than epidote
bentonite
gray clay, slippery, for industry rather than pottery
hematite
iron, red, heavy b/c of metal
garnet
neosilicates, has something else in it, aluminum, diff. colors
pyrite
fools gold, shiny, iron and sulfur
epidote
green, often in streaks in other rocks
rutile
titanium source, small columns
koalinite
white clay, used for pottery
zircon
tiny, used for radio dating
chalcopyrite
bronze-ish, copper ore