Scientific Name: Microcline variety of Feldspar

Group: Silicates – tectosilicates

Chemical composition: KALSi3O8

Colors: Blue-green.

Hardness: 6 to 6.5

Formation: Triclinic,; Short prismatic form, conchoidal to uneven, brittle fracture.

Principal Sources: Brazil; Russia; Colorado, USA

Special Notes: Amazonite, named after the Amazon River, is a blue green specimen of microcline feldspar. The Russian variety is noted for its deeper teal color and white streaks.