mineral
Tumbled orange-brown jasper (likely)
Microcrystalline quartz, SiO₂; jasper is an iron-oxide-colored variety of chalcedony
AI-generated identification · may be incorrectOpaque, mottled orange-brown with a polished surface; Mohs hardness about 6.5–7, vitreous to waxy luster, trigonal quartz structure, and no visible cleavage. The image alone cannot confirm the exact variety.
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Physical properties
Opaque, mottled orange-brown with a polished surface; Mohs hardness about 6.5–7, vitreous to waxy luster, trigonal quartz structure, and no visible cleavage. The image alone cannot confirm the exact variety.
Formation & geological history
Silica-rich fluids deposited and silicified material in fractures or cavities; iron oxides impart the color. Such deposits form in many geological settings and span a wide range of ages.
Uses & applications
Commonly tumbled for jewelry, beads, cabochons, and decorative objects; also collected as an inexpensive specimen.
Geological facts
Jasper is a trade name for opaque, patterned chalcedony rather than a single formally defined mineral species.
Field identification & locations
Look for opacity, fine-grained texture, and mottled iron-rich color; jasper occurs worldwide. A small polished tumble like this typically sells for about $1–$10 USD.
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