mineral

Tumbled feldspar (likely peach moonstone/sunstone)

Potassium–sodium feldspar; likely orthoclase or oligoclase, (K,Na)AlSi₃O₈

AI-generated identification · may be incorrect

Small polished pebble with cream, peach, and white coloration, vitreous-to-pearly luster, and no visible crystals. Feldspar has Mohs hardness 6–6.5, two cleavages near 90°, and specific gravity about 2.55–2.76.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Formed by crystallization in igneous rocks such as granite or pegmatite; feldspars are commonly Precambrian to modern in geological age. Tumbling has rounded and polished the natural fragment.

Uses & applications

Used extensively in glass and ceramic manufacture; attractive varieties are sold as decorative stones, cabochons, and inexpensive jewelry. This small tumbled specimen has modest collector value.

Geological facts

Peach moonstone is valued for adularescence, while sunstone may show glittery aventurescence from tiny inclusions; neither optical effect is clearly visible in this photograph.

Field identification & locations

Identify by its pale color, moderate hardness, glassy/pearly surface, and cleavage; it can be scratched by quartz but not easily by a steel knife. Common worldwide, especially in granitic terrains and feldspar-rich pegmatites.