Green, Greenish, Blue, Red
Brown, Brown, Reddish, Brownish, Yellow, Brown, Reddish, Brownish, Yellow
Not Available
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
SiO 2Arthur Thomas , Gemstones (2009)
FeO(OH)Arthur Thomas , Gemstones (2009)