sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness: 6.5 to 7 on the Mohs scale; Color: Red, brown, yellow, green, or multicolored; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None, exhibits conchoidal fracture; Specific gravity: 2.58 to 2.91
- Hardness
- 6
- Color
- Red, brown, yellow, green, or multicolored
- Luster
- Vitreous to dull
Identified More sedimentary →
Explore Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5 to 7 on the Mohs scale; Color: Red, brown, yellow, green, or multicolored; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None, exhibits conchoidal fracture; Specific gravity: 2.58 to 2.91
Formation & geological history
Formed through the accumulation of silica-rich sediments or silica deposition in hydrothermally active areas, often associated with precipitation of silica in marine or volcanic environments.
Uses & applications
Used primarily in lapidary work, ornamental carvings, jewelry, and as a collectible specimen.
Geological facts
Jasper has been used since ancient times for creating seals, talismans, and jewelry, and is mentioned in various historical texts.
Field identification & locations
Can be identified in the field by its waxy luster, conchoidal fracture, and inability to be scratched by a steel knife. Found worldwide in sedimentary and volcanic rock formations.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary