Mineral

Amazonite in Pegmatite Matrix with Smoky Quartz

K(AlSi3O8) - Microcline (var. Amazonite) with SiO2 (Quartz)

Hardness: 6-6.5 (Amazonite), 7 (Quartz); Color: Blue-green or turquoise-green; Luster: Vitreous to pearly; Crystal Structure: Triclinic (Amazonite); Cleavage: Perfect in two directions.

Hardness: 6-6
Color: Blue-green or turquoise-green
Luster: Vitreous to pearly

Identified March 15, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Amazonite), 7 (Quartz); Color: Blue-green or turquoise-green; Luster: Vitreous to pearly; Crystal Structure: Triclinic (Amazonite); Cleavage: Perfect in two directions.

Formation & geological history

Formed in granitic pegmatites, which are igneous rocks with exceptionally large crystals. This occurs during the final stages of a magma's crystallization, often at depths between 5-30 km. The green color is caused by traces of lead and water within the feldspar lattice.

Uses & applications

Used primarily as a gemstone, for lapidary work (cabochons, beads), and as mineral specimens for collectors. In ancient times, it was used for amulets and decoration.

Geological facts

Amazonite is named after the Amazon River, although no deposits have actually been found there; the name likely comes from confusion with other green stones. It is the only gemstone variety of the potassium feldspar mineral Microcline.

Field identification & locations

Identify by its distinct turquoise-green color with white streaks (perthitic lamellae) and associations with smoky quartz or mica. Significant deposits are found in Pikes Peak, Colorado (USA), Brazil, and Russia. Collectors should look for vibrant color and crystal shape.

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