igneous
Tumbled pink feldspar-rich stone
Likely microcline feldspar (KAlSi₃O₈), possibly granite or quartz-feldspar pegmatite
AI-generated identification · may be incorrectUsually salmon-pink to peach, with a vitreous to pearly luster, blocky feldspar cleavage, and Mohs hardness about 6–6.5; quartz grains or mica may produce the gray flecks. The rounded shape indicates tumbling or natural water wear.
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Physical properties
Usually salmon-pink to peach, with a vitreous to pearly luster, blocky feldspar cleavage, and Mohs hardness about 6–6.5; quartz grains or mica may produce the gray flecks. The rounded shape indicates tumbling or natural water wear.
Formation & geological history
Formed by slow cooling of silica-rich magma in granite or pegmatitic veins, generally during Precambrian to younger continental magmatism. Weathering and abrasion rounded the specimen.
Uses & applications
Used as an ornamental and lapidary stone, aggregate, ceramic flux, and dimension-stone component; attractive pieces are sold as tumbled stones. It is generally inexpensive.
Geological facts
The peach color commonly comes from tiny iron-bearing inclusions or alteration products within feldspar. Blue-gray patches could represent quartz, mica, or minor secondary minerals.
Field identification & locations
Identify by its pink color, relatively hard surface, uneven cleavage-like fractures, and lack of bubbles or glassy uniformity; a streak test is usually white. Common in granite terrains and glacial or stream gravels worldwide.
