Description | Turquoise, CuAl6(PO4)4(OH)8*5(H2O) (hydrated copper aluminum phosphate), is a valuable mineral and is possibly the most valuable, non-transparent mineral in the jewelry trade. Its history also includes beautiful ornamental creations by Native Americans and Persians. Turquoise is often imitated by “fakes”, such as the mineral chrysocolla, and poorer turquoise specimens are often dyed or color stabilized with coatings of various resins. |