Chrysocolla

Common card · No. 256876

Chrysocolla ( KRIS-ə-KOL-ə) is a hydrous copper phyllosilicate mineral and mineraloid with the formula Cu2 – xAlx(H2Si2O5)(OH)4⋅nH2O (x < 1) or (Cu, Al)2H2Si2O5(OH)4⋅nH2O). The structure of the mineral has been questioned, as a 2006 spectrographic study suggest material identified as chrysocolla may be a mixture of the copper hydroxide spertiniite and chalcedony. Chrysocolla typically forms amorphously.

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