mineral

Amazonite

K(AlSi3O8) - Microcline variant

Hardness: 6–6.5 (Mohs scale); Color: green to bluish-green, often with white streaks; Luster: vitreous (glassy) to pearly; Crystal Structure: Triclinic; Cleavage: perfect in two directions; Specific Gravity: 2.56–2.58.

Hardness: 6–6
Color: green to bluish-green, often with white streaks
Luster: vitreous (glassy) to pearly

Identified March 16, 2026More mineral →

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Physical properties

Formation & geological history

Amazonite is a green variety of microcline feldspar. It forms primarily in granitic pegmatites and deep-seated igneous rocks. Its distinct color is caused by the presence of lead and water within the feldspar structure. It is often found in geological formations ranging from the Proterozoic to more recent cooling events.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons and beads) and as a lapidary material for carvings. It is a popular specimen for mineral collectors due to its striking color and association with smoky quartz.

Geological facts

Formerly known as 'Amazon stone,' it was named after the Amazon River, though it is not actually found there. It is the official state gemstone of Colorado, USA, where the Pikes Peak region is famous for producing world-class specimens of amazonite paired with dark smoky quartz crystals.

Field identification & locations

Identify in the field by its distinct aqua-green color and the presence of white 'schiller' or perthitic streaks (inner growths of albite). Common locations include the Ilmen Mountains in Russia, the Pikes Peak region in Colorado (USA), Madagascar, and Brazil. Collectors look for sharp crystal edges and deep saturation of color.