sedimentary

Jasper with Quartz Veining

Silicon Dioxide (SiO2) with iron oxide impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Red, brown, and white, Luster: Dull to vitreous in quartz areas, Structure: Microcrystalline (Jasper) and Trigonal (Quartz), Cleavage: None

Hardness: 6

Identified June 27, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Red, brown, and white, Luster: Dull to vitreous in quartz areas, Structure: Microcrystalline (Jasper) and Trigonal (Quartz), Cleavage: None

Formation & geological history

Formed from the deposition of silica-rich fluids within volcanic or sedimentary rock fractures. The red coloration is typically caused by iron oxidation. Date back to various geological eras, commonly Paleozoic or Mesozoic depending on location.

Uses & applications

Used primarily for ornamental purposes, lapidary work (cabbing), jewelry making, and as decorative landscaping stone.

Geological facts

Jasper is an opaque variety of chalcedony. The presence of white quartz veins in red jasper is often referred to as 'Bresciated Jasper' if it has been broken and reformed, though this specimen shows distinct vein filling.

Field identification & locations

Look for a heavy, dense rock that cannot be scratched by a steel knife. It is commonly found in riverbeds and desert environments such as the American Southwest and South Africa.