sedimentary

Red Jasper

Jasper (Silicon Dioxide) - SiO2

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Brick red to brownish red
Luster: Vitreous to dull

Identified April 16, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from silica-rich fluids circulating through sedimentary rock or volcanic ash, often associated with hydrothermal activity. Its red color is derived from iron (hematite) inclusions.

Uses & applications

Used primarily in lapidary work for cabochons, beads, and architectural ornamentation. Also highly popular in jewelry and as a metaphysical/collecting gemstone.

Geological facts

Jasper is an opaque variety of chalcedony. It has been used for thousands of years; in ancient times, it was called the 'supreme nurturer' and was used for amulets and seals in Egypt and Mesopotamia.

Field identification & locations

Identify in the field by its deep red color, opacity (it does not let light through even at the edges), and smooth, waxy feel when polished or water-worn. Commonly found in riverbeds and desert environments globally.