igneous
Quartz-rich pegmatite fragment
Quartz (SiO₂) with likely feldspar and mica
AI-generated identification · may be incorrectVisible white-to-translucent quartz occurs with tan, flaky or blocky minerals, likely feldspar and mica. Quartz has Mohs hardness 7, vitreous luster, and no cleavage; the specimen’s exact mineral proportions cannot be determined from the image.
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Physical properties
Visible white-to-translucent quartz occurs with tan, flaky or blocky minerals, likely feldspar and mica. Quartz has Mohs hardness 7, vitreous luster, and no cleavage; the specimen’s exact mineral proportions cannot be determined from the image.
Formation & geological history
Likely crystallized slowly from silica-rich magma in a pegmatite or coarse-grained vein; such deposits formed at many ages and occur in continental crust.
Uses & applications
Commonly collected as a mineral specimen; quartz and feldspar are widely used in glass, ceramics, and construction materials.
Geological facts
Pegmatites can contain exceptionally large crystals and valuable rare minerals, though this small specimen shows no obvious gem-quality material.
Field identification & locations
Look for glassy, hard quartz alongside softer feldspar and platy mica; common in pegmatite veins and granite regions worldwide. A simple field identification would require testing individual grains.
