mineral

Amazonite

Microcline (K(AlSi3O8))

Hardness: 6-6.5 (Mohs scale); Color: green, blue-green, turquoise; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 2.56-2.58.

Hardness: 6-6
Color: green, blue-green, turquoise
Luster: Vitreous to pearly

Identified July 12, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs scale); Color: green, blue-green, turquoise; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 2.56-2.58.

Formation & geological history

Forms in plutonic igneous rocks, especially granitic pegmatites. It is a green variety of microcline feldspar that achieves its color from small amounts of lead and water content within the crystal structure.

Uses & applications

Primarily used as a gemstone for jewelry, beads, cabochons, and ornamental carvings. It is popular in the metaphysical and collecting communities.

Geological facts

Also known as the 'Amazon Stone,' though it is rarely found near the Amazon River. The name is more of a marketing term for its resemblance to the green river water. High-quality specimens with white streaking provide a 'schiller' effect.

Field identification & locations

Identify by its distinctive shades of turquoise-green and white streaking/marbling. It is commonly found in Brazil, Russia, Madagascar, and the United States (specifically Colorado and Virginia).