Azure spar
Videos
Azure spar, sometimes azur-spar, is a trivial and commercial, partly obsolete name for several of the most famous bright blue or blue-colored minerals, which also have similar names, most notably for
Lazurite (Badakhshan)
Lazurite
Hauyne
Azurite
Turquoise
Videos
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl648·4H2O. It is rare and valuable in finer grades and has been prized a
Azure spar
…in his fundamental works of 1804-1821 also included hauyne as a separate mineral species and the so-called “calaite”, which in the 1820s meant only turquoise, among the azure feldspars. All of the listed minerals are known primarily as ornamental stones, and have historically been used as painting pigments…
Turquoise 40031
"Big Blue", a large turquoise specimen from the copper mine at Cananea, Sonora, Mexico
Massive Kingman blue turquoise in matrix with quartz from the Mineral Park mine, Arizona, US
Turquoise of Madan-e Olya of Nishapur