igneous
Likely amazonite-bearing pegmatite
Amazonite (green microcline feldspar, KAlSi₃O₈) with quartz and mica or other pegmatite minerals
AI-generated identification · may be incorrectBlue-green, opaque to slightly translucent, with a vitreous to pearly luster and irregular, blocky fracture; feldspar hardness is about 6 on the Mohs scale. The small, rough specimen appears mixed with brown and pale mineral grains; crystal structure is monoclinic or, in some microcline, triclinic.
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Physical properties
Blue-green, opaque to slightly translucent, with a vitreous to pearly luster and irregular, blocky fracture; feldspar hardness is about 6 on the Mohs scale. The small, rough specimen appears mixed with brown and pale mineral grains; crystal structure is monoclinic or, in some microcline, triclinic.
Formation & geological history
Likely formed as feldspar crystallized from a slowly cooling, silica-rich pegmatite melt. Pegmatites occur in many geologic ages; age and exact identity cannot be determined from the image alone.
Uses & applications
Amazonite is used for beads, cabochons, carvings, and mineral collecting; pegmatite minerals are also sources of feldspar and other industrial materials.
Geological facts
Amazonite’s turquoise-green color is associated with trace lead and water-related defects in its feldspar structure; it is not a copper mineral.
Field identification & locations
Look for blue-green feldspar with blocky cleavage, commonly alongside quartz in coarse-grained pegmatites. The photograph is insufficient to confirm amazonite or identify its locality.
