sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs); Color: Mustard yellow, golden brown; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None; SG: 2.6-2.9
- Hardness
- 6
- Color
- Mustard yellow, golden brown
- Luster
- Vitreous to waxy
Identified More sedimentary →
Explore Yellow 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); Color: Mustard yellow, golden brown; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None; SG: 2.6-2.9
Formation & geological history
Formed through the infiltration of silica-rich fluids into sedimentary or volcanic rocks, where mineral impurities like iron oxide provide the distinct yellow hue.
Uses & applications
Used primarily for lapidary work, jewelry (beads, cabochons), tumbled stones for crystal healing, and decorative ornaments.
Geological facts
Jasper is an opaque variety of chalcedony. The name 'jasper' comes from the Greek word 'iaspis', meaning 'spotted stone'. It was highly prized in the ancient world for its supposed protective qualities.
Field identification & locations
Identified by its opacity, conchoidal fracture, and inability to be scratched by a steel knife. Common in Brazil, India, South Africa, and the western United States.
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