mineral
Pink feldspar fragment
Likely potassium feldspar (orthoclase or microcline), KAlSi₃O₈
AI-generated identification · may be incorrectOpaque salmon-pink, dull to vitreous luster, blocky cleavage surfaces, and Mohs hardness about 6. Feldspar is commonly granular or tabular, with two cleavage directions near 90°; the image alone cannot confirm exact species.
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Physical properties
Opaque salmon-pink, dull to vitreous luster, blocky cleavage surfaces, and Mohs hardness about 6. Feldspar is commonly granular or tabular, with two cleavage directions near 90°; the image alone cannot confirm exact species.
Formation & geological history
Formed by crystallization from silica-rich magma in granite, pegmatite, or related rocks, generally during Precambrian to Phanerozoic geological events. The fragment appears naturally broken or roughly shaped.
Uses & applications
Used extensively in glass and ceramic manufacturing, as well as aggregate and decorative stone; attractive crystals are collected but are usually inexpensive.
Geological facts
Pink color commonly results from trace iron, and feldspar is the most abundant mineral group in Earth’s crust. Orthoclase and microcline are polymorphs with the same chemical formula but different crystal structures.
Field identification & locations
Look for salmon-pink color, hardness sufficient to scratch glass, and prominent cleavage; unlike quartz, feldspar does not show conchoidal fracture and is less glassy. Common localities include granite regions worldwide, notably India, Madagascar, Norway, and the United States.
