mineral
Red jasper pebble
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored red by iron oxides
AI-generated identification · may be incorrectOpaque brick-red, smooth and rounded, with a dull to waxy luster; quartz has Mohs hardness 7 and a trigonal crystal structure, though crystals are microscopic. The image does not reveal internal texture or confirm the identification.
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Physical properties
Opaque brick-red, smooth and rounded, with a dull to waxy luster; quartz has Mohs hardness 7 and a trigonal crystal structure, though crystals are microscopic. The image does not reveal internal texture or confirm the identification.
Formation & geological history
Jasper forms when silica-rich fluids or sediments become enriched with iron oxides and lithify; its age depends on the source deposit. Pebbles like this are typically rounded by water or other abrasion.
Uses & applications
Used for beads, cabochons, carvings, and decorative objects; also collected as a common lapidary stone.
Geological facts
Jasper is a trade and descriptive name for opaque, patterned microcrystalline quartz, not a single distinct mineral species.
Field identification & locations
Look for opacity, red iron-oxide coloration, and hardness sufficient to scratch glass; similar-looking red stones can require testing to distinguish. Jasper occurs worldwide in silica-rich rocks and gravels.
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