sedimentary

Red Jasper

Jasper (variety of Chalcedony), SiO2

Hardness: 6.5-7 (Mohs). Color: Red to reddish-brown due to iron inclusions. Luster: Dull to vitreous. Crystal Structure: Microcrystalline/Trigonal. Cleavage: None (conchoidal fracture).

Hardness: 6
Color: Red to reddish-brown due to iron inclusions
Luster: Dull to vitreous

Identified July 13, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs). Color: Red to reddish-brown due to iron inclusions. Luster: Dull to vitreous. Crystal Structure: Microcrystalline/Trigonal. Cleavage: None (conchoidal fracture).

Formation & geological history

Formed when silica-rich fluids permeate through volcanic ash or sedimentary deposits, often during hydrothermal processes. The red color comes from high iron oxide (hematite) content.

Uses & applications

Used primarily as a decorative stone, in jewelry (cabochons, beads), and for metaphysical or lapidary collecting purposes.

Geological facts

Red Jasper has been used since antiquity in seals and jewelry. It is often referred to as the 'Stone of Endurance' in folklore. It is a common component of glacial till in certain regions.

Field identification & locations

Check for its characteristic red color and smooth, waxy feel when wet. It won't be scratched by a steel knife. Common in riverbeds, beaches, and desert plains globally, especially in the US (Pacific Northwest and Lake Superior regions).