mineral

Blue-green tumbled mineral, likely amazonite

Amazonite (microcline feldspar), KAlSi₃O₈

AI-generated identification · may be incorrect

Blue-green opaque material with pale mottling and a dull-to-waxy, likely polished surface. Microcline hardness is about 6–6.5 Mohs, with vitreous luster, blocky crystal structure, and two cleavages near 90°; the image does not clearly show cleavage.

Identified September 10, 2026More mineral →

Explore Blue-green tumbled mineral, likely amazonite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Amazonite forms in potassium-rich granitic pegmatites through late-stage hydrothermal processes, commonly in Precambrian to younger granitic terrains. The specimen appears tumbled or naturally water-worn.

Uses & applications

Used as a lapidary stone for cabochons, beads, carvings, and specimens; generally decorative rather than industrial.

Geological facts

The blue-green color is caused mainly by trace lead and water-related defects in microcline. Its color can resemble turquoise, chrysocolla, or blue-green quartz.

Field identification & locations

Look for a blue-green feldspar with white streaks, mottled zoning, and possible cleavage; it should scratch glass but not quartz. At 13.2°N, 39.2°E, Ethiopian volcanic and granitic rocks are plausible, but this exact identification requires tests such as streak, hardness, and specific gravity.