Mineral
Ocean Jasper
Orbicular Jasper / Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale. Colors vary widely, this specimen is predominantly white, cream, and pale grayish-blue with small brown/tan inclusions. Waxy to dull luster. Cryptocrystalline structure. No cleavage. Specific gravity of 2.58-2.64.
Identified More mineral →
Explore Ocean Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6.5-7 on the Mohs scale. Colors vary widely, this specimen is predominantly white, cream, and pale grayish-blue with small brown/tan inclusions. Waxy to dull luster. Cryptocrystalline structure. No cleavage. Specific gravity of 2.58-2.64.
Formation & geological history
Formed from the precipitation of silica-rich waters in cavities of volcanic rock. The orbicular patterns are formed by spherulitic growth of chalcedony. specifically ocean jasper is unique to the northwestern coast of Madagascar.
Uses & applications
Primarily used as a lapidary material for cabochons, pendants, beads, and carvings due to its striking patterns. Collector's mineral.
Geological facts
Ocean Jasper is a trademarked name for a specific type of orbicular jasper found only in a small area on the coast of Madagascar, which can only be mined at low tide.
Field identification & locations
Identify by its distinctive circular, orb-like patterns (eyes). It is relatively hard and takes a good polish. It is exclusively found in Madagascar.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary