sedimentary
Red Jasper
Chalcedony (SiO2 with Iron inclusions)
Hardness: 6.5-7 (Mohs); Color: Brick red to brownish red; Luster: Dull to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Brick red to brownish red
- Luster
- Dull to waxy
Identified More sedimentary →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 (Mohs); Color: Brick red to brownish red; Luster: Dull to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91
Formation & geological history
Formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediments, where the presence of iron oxide (hematite) provides the red pigmentation. It is often found in prehistoric sedimentary beds or hydrothermal veins.
Uses & applications
Used widely in ornamental crafts, jewelry (beads, cabochons), landscaping stones, and as a 'grounding' stone in metaphysical practices.
Geological facts
Jasper has been used by ancient civilizations for thousands of years; the Minoans used it for seal stones, and it is mentioned in the Bible as one of the stones in the High Priest's breastplate.
Field identification & locations
Identify it by its distinctive opaque red color, inability to be scratched by a steel knife, and smooth, waxy texture when wet. Commonly found in riverbeds and desert environments.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary