mineral

Peach-colored feldspar fragment (likely orthoclase or microcline)

Potassium feldspar, KAlSi₃O₈

AI-generated identification · may be incorrect

Typically salmon, peach, or cream; vitreous to pearly luster; Mohs hardness 6; two cleavage directions near 90°; monoclinic orthoclase or triclinic microcline crystal structure. The image is insufficient for definitive identification and could also represent pale-colored quartz or calcite.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich magma cools slowly in intrusive igneous rocks such as granite and syenite; potassium feldspar is common from Precambrian to modern geological settings. Weathering can produce irregular chips like this specimen.

Uses & applications

Used in ceramics, glass, abrasives, and as a major component of granite and other construction stone; attractive crystals are collected but are usually low-value.

Geological facts

Feldspar is the most abundant mineral group in Earth’s crust. The peach color commonly results from iron-bearing impurities or microscopic inclusions.

Field identification & locations

Look for flat cleavage surfaces, hardness that exceeds glass, and pink grains in granite; a steel knife generally will not scratch it. Common worldwide, especially in granitic terrains such as the United States, Canada, India, and Scandinavia.