mineral

Amazonite

Amazonite (K[AlSi3O8])

Hardness: 6.0-6.5 (Mohs scale), Color: pale green to deep turquoise-green, Luster: vitreous to pearly, Crystal structure: Triclinic, Cleavage: perfect (two directions at nearly 90 degrees), Specific gravity: 2.56-2.58

Hardness: 6

Identified July 12, 2026More mineral →

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Physical properties

Formation & geological history

Amazonite is a variety of Microcline feldspar. It forms in plutonic igneous rocks, specifically pegmatites, through the cooling of mineral-rich fluids deep within the Earth's crust. Its color is attributed to the presence of lead and water within the feldspar lattice.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons and beads) and as an ornamental stone for carvings and decorative objects. It is a popular specimen for mineral collectors.

Geological facts

Named after the Amazon River, though it was not historically found there. In ancient Egypt, it was used to carve amulets and was found in King Tutankhamun's tomb. It is often referred to as 'Amazon Stone'.

Field identification & locations

Identified in the field by its distinct green to blue-green color often featuring white streaks or grid-like mottling. Most notably found in the Ural Mountains (Russia), Colorado and Virginia (USA), Brazil, and Madagascar. Look for its characteristic feldspar cleavage.