mineral

Amazonite

K(AlSi3O8) - Microcline (Lead-bearing variety)

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

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

Identified March 15, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in plutonic rocks, primarily in granitic pegmatites. The blue-green color is attributed to the presence of small amounts of lead and water within the feldspar lattice. It is found in geological formations ranging from the Proterozoic to the Tertiary period.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular mineral specimen for collectors. In ancient times, it was used for amulets and inlays.

Geological facts

Known as the "Amazon Stone," it was named after the Amazon River, though no deposits are actually found there. It has been used since ancient Egypt, where it was featured in the mask of Tutankhamun. The finest specimens are currently found at the Pikes Peak area in Colorado, often associated with smoky quartz.

Field identification & locations

Identify in the field by its distinct blue-green color and 'exsolution lamellae' (faint white streaks or a grid-like pattern). It is commonly found in Colorado (USA), Brazil, Madagascar, and Russia. Collectors should look for sharp crystal forms and deep, saturated color.

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