sedimentary
Ocean Jasper
Orbicular Jasper (Silicon Dioxide - SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Multicolored (red, pink, cream, green), Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline/cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.6-2.9
- Hardness
- 6
Identified More sedimentary →
Explore Ocean 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 scale), Color: Multicolored (red, pink, cream, green), Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline/cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.6-2.9
Formation & geological history
Formed through the precipitation of silica from hot springs and volcanic activity where layers of rhyolite are replaced by chalcedony. This specific material is found in the sediment of tidal zones and is believed to be millions of years old.
Uses & applications
Ornamental carvings, jewelry, lapidary art, and metaphysical collecting.
Geological facts
Ocean Jasper is technically a trade name for orbicular jasper found only on the coast of Madagascar. It is called 'Ocean' Jasper because the original deposits were only accessible by boat at low tide.
Field identification & locations
Identify by its distinctive orbicular (circular) patterns and translucent to opaque areas. It is found exclusively along the northwestern coast of Madagascar (Analalava district).
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