igneous
Pink-and-gray quartz-rich pegmatite, possibly rose quartz with feldspar
Quartz (SiO₂) with K-feldspar/plagioclase; likely pegmatitic granite
AI-generated identification · may be incorrectHardness about 6–7 Mohs; pale gray, white, and pink; vitreous to pearly luster with massive, interlocking crystals and no obvious cleavage in quartz. Feldspar portions show cleavage and are softer (Mohs 6).
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Physical properties
Hardness about 6–7 Mohs; pale gray, white, and pink; vitreous to pearly luster with massive, interlocking crystals and no obvious cleavage in quartz. Feldspar portions show cleavage and are softer (Mohs 6).
Formation & geological history
Likely formed as a coarse-grained intrusive pegmatite from slowly cooling, silica-rich magma, generally in Precambrian to younger crystalline terrains. The pink color commonly comes from iron-bearing quartz or potassium feldspar.
Uses & applications
Used as a decorative stone, lapidary material, and mineral specimen; larger uniform pieces may be polished for ornamental applications. This irregular specimen has modest commercial value.
Geological facts
The image does not show diagnostic crystal faces, so exact identification is uncertain; it could also be quartz-bearing metamorphic rock or chalcedony-rich material. A glassy translucent surface and hardness testing would help distinguish quartz from feldspar.
Field identification & locations
Common in granite and metamorphic regions worldwide, including Brazil, Madagascar, the United States, and Scandinavia. Quartz scratches glass, while feldspar generally does not; avoid relying on color alone.
