Primarily used for making necklaces, brooches, amulets and objets d'art. It is a secondary mineralization and is rich in apatite and chalcopyrite. Turquoises usually occur as grape or kidney-shaped aggregates and are soluble in hydrochloric acid.
Crystal structure: Triclinic.
Color; Blue-white to sky-blue, light greenish-blue to light blue.
Turquoise - Teaches infinity of sea and sky, purity of spirit.