sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
- Hardness
- 6
Identified More sedimentary →
Explore Red Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the infiltration of silica-rich waters into volcanic or sedimentary rocks, where it replaces organic or mineral matter. Its red color is derived from high concentrations of iron oxide (hematite).
Uses & applications
Used primarily in lapidary arts for cabochons, beads, and decorative carvings. Historically used for seals and amulets. Also used as a landscaping stone.
Geological facts
Red Jasper is known as a stone of endurance and nurturing. It has been used by various cultures for thousands of years, including Ancient Egyptians who associated it with the blood of Isis.
Field identification & locations
Identify in the field by its deep red color, waxy feel, and inability to be scratched by a steel blade. Commonly found in riverbeds or coastal areas in the western USA, India, Russia, and Brazil.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Brown Sandstone (River Rock)
Arenite
sedimentary
Mudstone
Argillite / Siliciclastic sedimentary rock
sedimentary
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary