sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Brick red to deep terracotta; Luster: Dull/waxy in rough state; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture)

Hardness: 6
Color: Brick red to deep terracotta
Luster: Dull/waxy in rough state

Identified July 18, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Brick red to deep terracotta; Luster: Dull/waxy in rough state; Crystal Structure: Microcrystalline; Cleavage: None (conchoidal fracture)

Formation & geological history

Formed from silica-rich fluids filtering through sedimentary or volcanic ash beds. The red color is derived from hematite/iron impurities. Ages range from Proterozoic to more recent geological eras.

Uses & applications

Primarily used in jewelry, lapidary arts (beads, cabochons), ornamental decoration, and as a 'healing' stone in metaphysical circles.

Geological facts

Red Jasper is a variety of chalcedony. It has been used historically for thousands of years, appearing in the seals of ancient Minoans and mentioned in several religious texts as a significant gem.

Field identification & locations

Identify in the field by its opaque deep red color, conchoidal fracture, and high hardness (it will scratch glass). Commonly found in riverbeds or near volcanic deposits across the American Southwest, South Africa, and Brazil.