"Chrysocolla (/ˌkrɪsəˈkɒlə/ KRIS-ə-KOL-ə) is a hydrated copper phyllosilicate mineral and mineraloid with formula Cu2–xAlx{H2–xSi2O5)(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." - (en.wikipedia.org 27.05.2022)
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