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Formula Fe2O3 Structure Non-silicate Crystal System Crystal system: trigonal (-) Physical Properties Colour in hand specimen: black, steel-grey and bright to dull red Streak: cherry-red Cleavage: none Hardness: 5-6 Optical…

Hand Specimen Superficially specimens “a” and “b” look very different due to their colours. L340a is pale grey, while L340b is dark purple-red. The colour of L340b indicates that it is ferruginous, containing significant quantities of iron…