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Showing 1 to 1 of 1 for “"Andean blue opal"”.
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INTEGRATED AND MULTI-SCALE CHARACTERISATION OF GEM MATERIALS LACKING LONG-RANGE ORDER. THE CASE STUDIES OF CHRYSOCOLLA AND ANDEAN BLUE OPAL
… a long-range structural order, chrysocolla and Andean blue opal. Chrysocolla is a hydrated copper silicate (Cu2-xAlx(H2-xSi2O5)(OH)4·nH4O), known for its vivid blue–green colour and its millennial use (Bianucci et al., 2009; Clark, 2021; Torpy et al., 2021). Its classification remains debated …