The turquoise is a mineral of blue color green . It is an aluminum phosphate and copper . Its formula is: CuAl 6 (PO 4 ) 4 (OH) 8 · 5H 2 O. Is scarce and valuable for its quality. It was much appreciated as and ornamental gemstone for thousands of years due to its unique color. Today, like so many other gems, is very popular in the market due to the introduction of treatments and imitations, some very difficult to detect even by experts.
turquoise The word is very old and of undetermined origin. Derived from the French pierre turquoise, meaning Turkish stone . It is thought that this arises from a confusion, because in Turkey no turquoise, but they were sold there, and then the stone was associated with that country.
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