mineral
Orbicular Jasper (Ocean Jasper)
Silicon Dioxide (SiO2) with various inclusions
Hardness: 6.5-7 (Mohs), Color: Multicolored with distinctive circular/orbicular patterns (green, brown, white), Luster: Vitreous to waxy, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None
- Hardness
- 6
Identified More mineral →
Explore Orbicular Jasper (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), Color: Multicolored with distinctive circular/orbicular patterns (green, brown, white), Luster: Vitreous to waxy, Crystal Structure: Trigonal (Microcrystalline), Cleavage: None
Formation & geological history
Formed via hydrothermal precipitation where silica-rich fluids filled cavities in volcanic rock, crystallizing to create needle-like inclusions that form the unique orbs. Found primarily in Triassic rock layers.
Uses & applications
Primarily used for lapidary work, decorative carvings, jewelry (cabochons), and as collectibles for mineral enthusiasts.
Geological facts
Ocean Jasper is only found on the coast of Madagascar. The original mine was found along the shoreline and could only be accessed and harvested during low tide.
Field identification & locations
Identify by the presence of 'eyes' or circular patterns against a solid or translucent background. It is a favorite for collectors due to its high variety and aesthetic appeal. Common in Madagascar.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock