mineral

Tumbled pink-orange feldspar

Microcline or orthoclase feldspar, KAlSi₃O₈ (tentative)

AI-generated identification · may be incorrect

Hardness about 6–6.5 Mohs; cream to salmon-orange color with pearly or vitreous luster, rounded by tumbling, and likely cleavage surfaces beneath the polish. The translucent, mottled appearance may also indicate feldspar-bearing quartzite or an altered feldspathic rock.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Feldspar crystallizes mainly in cooling granitic and pegmatitic igneous rocks, generally ranging from Precambrian to recent geological ages. The specimen appears human-tumbled and polished from naturally weathered material.

Uses & applications

Used industrially in glass, ceramics, and abrasives; attractive pieces are sold as inexpensive lapidary specimens and occasionally cabochons.

Geological facts

Pink coloration commonly comes from iron impurities or trace-element defects. Distinguishing feldspar from quartz requires cleavage, hardness, and crystal habit, which are obscured here by tumbling.

Field identification & locations

Common in granites, pegmatites, gneisses, and river gravels worldwide, especially in regions with abundant granite. A glass-scratch test, visible cleavage, and lack of strong conchoidal fracture support feldspar identification.