sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Red, terracotta; Luster: Dull to vitreous; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Red, terracotta
Luster: Dull to vitreous

Identified May 10, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Red, terracotta; Luster: Dull to vitreous; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed from silica-rich fluids that deposit microcrystalline quartz in coastal environments or through hydrothermal processes. The red color comes from iron oxide (hematite) impurities included during formation.

Uses & applications

Used primarily in jewelry (cabochons, beads), decorative carvings, and as a healing stone in holistic practices. Historically used for making tools and seals.

Geological facts

The name Jasper comes from the Greek word 'iaspis', meaning 'spotted stone'. It is one of the traditional birthstones for March and has been found in ancient archaeological sites dating back over 5,000 years.

Field identification & locations

Identify in the field by its deep red color, high hardness (cannot be scratched by a steel knife), and its characteristic smooth, waxy feel when polished naturally by water. Commonly found in riverbeds and coastlines.