mineral
Green-and-white rough mineral specimen, possibly amazonite
Unconfirmed; possible amazonite, a green variety of microcline feldspar (KAlSi₃O₈)
AI-generated identification · may be incorrectSmall, irregular, blue-green and white piece with a dull to slightly vitreous surface. If amazonite: Mohs hardness 6–6.5, triclinic crystals, two good cleavage directions; the photo is insufficient to confirm identity or specific gravity.
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Physical properties
Small, irregular, blue-green and white piece with a dull to slightly vitreous surface. If amazonite: Mohs hardness 6–6.5, triclinic crystals, two good cleavage directions; the photo is insufficient to confirm identity or specific gravity.
Formation & geological history
Amazonite forms in potassium-rich granites and pegmatites as magma cools; these deposits can range from Precambrian to much younger ages. The pictured specimen’s exact formation and age cannot be determined visually.
Uses & applications
Amazonite is used for beads, carvings, and ornamental stone; feldspar is also an important industrial ceramic and glass ingredient.
Geological facts
Amazonite’s blue-green color is associated with trace lead and water-related defects in its crystal structure.
Field identification & locations
A firm identification would require close inspection or mineral tests; amazonite is commonly found in pegmatites, including in Colorado, Russia, and Madagascar. Similar green minerals can look alike in a small photo.
