igneous
Polished orange granite pebble
Granite, typically quartz + feldspar + mica; orange varieties are often alkali-feldspar-rich
AI-generated identification · may be incorrectMedium- to coarse-grained, mottled orange-pink, white, and dark minerals with a glassy-to-waxy polish; hardness about 6–7 Mohs, no prominent cleavage as a whole, and specific gravity about 2.6–2.8.
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Physical properties
Medium- to coarse-grained, mottled orange-pink, white, and dark minerals with a glassy-to-waxy polish; hardness about 6–7 Mohs, no prominent cleavage as a whole, and specific gravity about 2.6–2.8.
Formation & geological history
An intrusive igneous rock crystallized slowly from silica-rich magma deep in the crust, commonly during Precambrian to younger continental mountain-building events. The rounded shape is natural water abrasion or human tumbling/polishing.
Uses & applications
Used for countertops, flooring, monuments, landscaping, tiles, and decorative specimens; this piece has modest ornamental value rather than gemstone value.
Geological facts
The orange color commonly comes from iron-stained potassium feldspar, while black grains are usually biotite or hornblende and translucent grains may be quartz.
Field identification & locations
Identify it by visible interlocking grains, feldspar-dominated orange coloring, scattered dark mica/amphibole, and granite-like density; it should not fizz with dilute acid. Common sources include granite terrains worldwide, especially North America, Scandinavia, India, and Brazil.
