mineral
Red jasper flake/tool blank
Jasper, microcrystalline quartz (SiO₂), colored by iron oxides
AI-generated identification · may be incorrectOpaque brick-red to reddish-brown, waxy to dull luster, conchoidal fracture, no visible cleavage; Mohs hardness about 6.5–7 and specific gravity roughly 2.5–2.7. The regular flake-like shape and worked edges suggest it may be a polished or knapped jasper artifact rather than a naturally broken specimen.
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Physical properties
Opaque brick-red to reddish-brown, waxy to dull luster, conchoidal fracture, no visible cleavage; Mohs hardness about 6.5–7 and specific gravity roughly 2.5–2.7. The regular flake-like shape and worked edges suggest it may be a polished or knapped jasper artifact rather than a naturally broken specimen.
Formation & geological history
Jasper forms when silica-rich fluids replace or cement fine sediments, with iron oxides producing the red color; deposits range from Precambrian to younger ages. It occurs in volcanic, sedimentary, and hydrothermal settings.
Uses & applications
Used as an ornamental stone, beads, cabochons, carvings, and lapidary material; historically suitable for sharp-edged tools when knapped. Common material has modest commercial value.
Geological facts
Jasper is a variety of chert and is composed mainly of quartz too fine-grained to show individual crystals. The apparent flaking and edge shaping may indicate human workmanship, though a photograph cannot confirm archaeological status.
Field identification & locations
Common in iron-rich chert deposits worldwide, including the United States, Mexico, India, Madagascar, and Australia. Test cautiously with a steel file or glass-scratch test; do not clean or alter a possible artifact before professional evaluation.
