sedimentary
Picture Jasper
Tectonically broken chalcedony (SiO2)
Hardness: 6.5–7 on Mohs scale; Color: Tan, brown, and cream with dark dendrites; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal (Microcrystalline); Cleavage: None.
- Hardness
- 6
- Color
- Tan, brown, and cream with dark dendrites
- Luster
- Vitreous 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 on Mohs scale; Color: Tan, brown, and cream with dark dendrites; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal (Microcrystalline); Cleavage: None.
Formation & geological history
Formed through the petrification of mud or volcanic ash in high-pressure hydrothermal environments. The landscape-like patterns are created by flow patterns of water and minerals (like iron) as they seep through the stone during formation.
Uses & applications
Primarily used for lapidary work, jewelry (cabochons), interior decoration, and as a collectible metaphysical stone.
Geological facts
Named Picture Jasper because the dendritic inclusions and banding often resemble landscapes or scenic paintings. Most high-quality specimens come from the Owyhee Mountains and Biggs Junction areas.
Field identification & locations
Identify by its tan-to-brown earth tones and scenery-like markings. Common in desert regions of Idaho and Oregon. Collectors look for high contrast and clear images.
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