Amazonite

Physical Properties

Mohs Hardness: 6-6.5; Color: Green to bluish-green; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58

Formation & Geological History

Amazonite is a variety of microcline feldspar. It primarily forms in granitic rocks, pegmatites, and some schists through slow cooling of magma and hydrothermal activity. The color is attributed to the presence of lead and water variations.

Uses & Applications

Mainly used as a gemstone in jewelry (cabochons, beads), decorative carvings, and as a popular specimen for mineral collectors.

Geological Facts

Named after the Amazon River, though it was later found that no deposits exist there. It is sometimes called 'Amazon Stone.' The color was long thought to be due to copper, but modern research indicates lead.

Field Identification & Locations

Identified by its distinctive turquoise-green color often featuring white streaks (perthitic textures). Found commonly in Russia, Colorado (USA), Madagascar, and Brazil.

Identified on: 5/1/2026

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