mineral
Likely rough pink feldspar or rose quartz
Most likely microcline feldspar (KAlSi₃O₈) or rose quartz (SiO₂)
AI-generated identification · may be incorrectThe specimen is opaque pink-purple with a dull to slightly vitreous luster and irregular cleavage-like faces. Feldspar has Mohs hardness 6–6.5 and two cleavages near 90°; rose quartz is harder, about 7, and lacks obvious cleavage. Identification is uncertain from the image alone.
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Physical properties
The specimen is opaque pink-purple with a dull to slightly vitreous luster and irregular cleavage-like faces. Feldspar has Mohs hardness 6–6.5 and two cleavages near 90°; rose quartz is harder, about 7, and lacks obvious cleavage. Identification is uncertain from the image alone.
Formation & geological history
Pink feldspar commonly crystallizes in silica-rich granitic pegmatites during slow cooling of magma; rose quartz forms in hydrothermal veins and pegmatites. These minerals are generally Precambrian to Phanerozoic depending on the deposit.
Uses & applications
Used primarily as a collector specimen; feldspar is important in ceramics and glass, while rose quartz is used for carvings, beads, and inexpensive jewelry.
Geological facts
The small brown object appears to be a separate specimen, possibly tumbled jasper or quartz, rather than part of this sample.
Field identification & locations
Check for two flat cleavage directions and a white streak for feldspar; rose quartz shows conchoidal fracture and scratches glass. Common sources include Brazil, Madagascar, India, and U.S. pegmatites.
