mineral

Pale blue-green tumbled stone, possibly amazonite

Likely amazonite, a variety of microcline feldspar (KAlSi₃O₈); identification is uncertain from the image alone

AI-generated identification · may be incorrect

Small, smooth, rounded pale blue-green pebble with dark mottling. Amazonite has Mohs hardness 6–6.5, a vitreous to pearly luster, and monoclinic crystals with two cleavages near 90°.

Identified October 15, 2026More mineral →

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Physical properties

Small, smooth, rounded pale blue-green pebble with dark mottling. Amazonite has Mohs hardness 6–6.5, a vitreous to pearly luster, and monoclinic crystals with two cleavages near 90°.

Formation & geological history

If amazonite, it formed as potassium feldspar in granitic pegmatites as magma cooled; such deposits occur in rocks ranging from Precambrian to much younger ages.

Uses & applications

Amazonite is used for beads, cabochons, carvings, and decorative objects; this pebble appears tumbled for collecting or jewelry craft.

Geological facts

Amazonite’s blue-green color is associated with trace lead and water-related defects in its crystal structure; color alone cannot confirm the mineral.

Field identification & locations

Check for feldspar-like cleavage and hardness, and compare with a reliable reference specimen; common sources include Brazil, Russia, Madagascar, and the United States. The image does not establish the identity or exact locality.