sedimentary

Red Jasper

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Opaque Brick-Red; Luster: Vitreous to dull; Crystal Structure: Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Opaque Brick-Red
Luster: Vitreous to dull

Identified June 28, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Opaque Brick-Red; Luster: Vitreous to dull; Crystal Structure: Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed from silica-rich groundwater circulating through volcanic or sedimentary ash layers, where iron oxides (hematite) provide the red pigmentation. It is found in deposits ranging from Precambrian to recent ages.

Uses & applications

Used primarily in lapidary arts, jewelry (beads, cabochons), ornamental vases, and as a popular stone for tumbling and meditation collections.

Geological facts

The name Jasper comes from the Greek word 'iaspis', meaning 'spotted stone'. In ancient civilizations, it was known as the 'supreme nurturer' and was used for amulets and seals.

Field identification & locations

Identify by its solid red color, high hardness (cannot be scratched by a steel nail), and smooth, waxy surface when polished. Commonly found in India, Brazil, Egypt, and the southwestern USA.