mineral
Red jasper pebble
Microcrystalline quartz (SiO₂), colored by iron oxides; possibly brecciated jasper
AI-generated identification · may be incorrectOpaque brick-red to brown with dark gray patches and a waxy-to-dull luster; quartz has Mohs hardness about 6.5–7, no cleavage, cryptocrystalline structure, and specific gravity near 2.6. The rounded shape suggests natural water wear or tumbling.
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Physical properties
Opaque brick-red to brown with dark gray patches and a waxy-to-dull luster; quartz has Mohs hardness about 6.5–7, no cleavage, cryptocrystalline structure, and specific gravity near 2.6. The rounded shape suggests natural water wear or tumbling.
Formation & geological history
Jasper forms when silica-rich fluids or sediments become silicified, with hematite/goethite producing the red coloration; brecciation may indicate repeated fracturing and mineral cementation. Its exact geological age cannot be determined from the image.
Uses & applications
Used as an ornamental stone, cabochon, bead, carving material, and inexpensive lapidary specimen; rarely used decoratively in aggregate or architectural accents.
Geological facts
Jasper is a variety of opaque, impure chalcedony or microcrystalline quartz. Red coloration generally reflects finely dispersed iron oxides rather than metallic copper.
Field identification & locations
Identify by its opaque red color, very fine texture, hardness, and inability to scratch with a steel knife easily; a streak or specific locality would improve identification. Common worldwide, including India, Madagascar, Brazil, Australia, and the western United States.
