Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

turquoise




turquoise
A hydrated copper aluminum phosphate mineral, CuAl6(PO4)4(OH)8.4H2O; used as a semiprecious gemstone, blue in color. Deposited from water, it occurs in veinlets and as masses. The finest turquoise comes from Iran.


Related category

   • GEOLOGY AND PLANETARY SCIENCE