sedimentary
Red Jasper (Brecciated)
Silicon Dioxide with Iron inclusions (SiO2)
Hardness: 6.5-7 (Mohs); Color: Brick red to brownish-red with dark patterns; Luster: Vitreous to waxy (especially when wet or polished); Crystal Structure: Microcrystalline/Trigonal; Specific Gravity: 2.58-2.91.
- Hardness
- 6
- Color
- Brick red to brownish-red with dark patterns
- Luster
- Vitreous to waxy (especially when wet or polished)
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 with dark patterns; Luster: Vitreous to waxy (especially when wet or polished); Crystal Structure: Microcrystalline/Trigonal; Specific Gravity: 2.58-2.91.
Formation & geological history
Formed through the accumulation of fine-grained silica in hydrothermal veins or sedimentary environments, often solidified from volcanic ash or silica-rich water. The red color is caused by iron oxide (hematite) impurities.
Uses & applications
Used widely for lapidary work, jewelry (beads, cabochons), metaphysical healing practices, and as decorative gravel or ornamental stone.
Geological facts
Jasper is an opaque variety of chalcedony. Historically, it was known as the 'supreme nurturer' and was worn by ancient civilizations in amulets and seals.
Field identification & locations
Identify by its hardness (cannot be scratched by a steel knife), opacity (even on thin edges), and dull to waxy luster. Commonly found in riverbeds and coastal areas.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Arenite
sedimentary