Specific gravity: 6.7 to 7.4
Hardness: 2½ to 3½
Colour: Yellow to brown, greenish, green-grey, grey or black; colourless or tinted in shades of faint yellow, green, etc. in transmitted light.
Solubility: Soluble in acids with effervescence
Bismutite is a relaatively common secondary bismuth carbonate, and an alteration product of
bismuthinite and native bismuth.
Associated minerals include bismuth, bismuthinite,
tetradymite, arsenobismite, beyerite, bismite, cerussite,
mixite, pucherite and sillénite.
Common impurities: Fe, Cu