mineral

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Hardness: 6-6.5; Color: Blue-green, turquoise, or sea-green; Luster: Vitreous; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58

Hardness: 6-6
Color: Blue-green, turquoise, or sea-green
Luster: Vitreous

Identified March 23, 2026More mineral →

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Physical properties

Hardness: 6-6.5; Color: Blue-green, turquoise, or sea-green; Luster: Vitreous; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58

Formation & geological history

Formed in granitic pegmatites and hydrothermal veins during late-stage igneous crystallization; color is caused by the presence of trace lead and water in the crystal lattice.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons and beads) and as a lapidary material for ornamental carvings.

Geological facts

Also known as 'Amazon Stone', it was named after the Amazon River, though it is not actually found there; it has been used as a gemstone since the time of the Pharaohs in ancient Egypt.

Field identification & locations

Identify by its distinct sea-green color and 'Schiller' effect (shimmering internal patterns). Frequently found in Colorado (Pikes Peak), Madagascar, Russia (Ilmen Mountains), and Brazil.

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