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Graphite
Gray
Galena
Silver
Pyrite
Yellow
Hematite
Reddish-silver or red-brown
Magnetite
Black
Talc
White to gray or pale to dark green
Sulfur
Yellow
Selenite gypsum
Colorless to white
Muscovite mica
Colorless to silver
Halite
Colorless or white
Biotite mica
Black to dark brown
Calcite
Colorless to white or pink
Dolomite
Colorless or white or pink
Fluorite
Colorless or white to purple
Pyroxene (common augite)
Black to dark green
Amphibole (common hornblende)
Black to dark green
Potassium feldspar (common orthoclase)
Pink to white
Plagioclase feldspar
White to gray
Olivine
Olive green or gray or brown
Quartz
Colorless to white to pink
Garnet
Reddish to yellowish-green