mineral
Ocean Jasper or Orbicular Jasper
SiO2
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Colors can include shades of green, brown, cream, white, red, and yellow. Luster is vitreous to dull. It is a microcrystalline variety of quartz (chalcedony) featuring spherical or orbicular patterned inclusions.
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Physical properties
Mohs hardness of 6.5 to 7. Colors can include shades of green, brown, cream, white, red, and yellow. Luster is vitreous to dull. It is a microcrystalline variety of quartz (chalcedony) featuring spherical or orbicular patterned inclusions.
Formation & geological history
Formed from silica-rich fluids that precipitated within cavities of volcanic rock (rhyolite). Found primarily in Madagascar.
Uses & applications
Used primarily in lapidary arts, jewelry making, and as a collectible specimen or ornamental stone.
Geological facts
Ocean Jasper is also known as orbicular jasper. The distinctive circular or 'orb' patterns are formed by spherulites (radiating crystal aggregates).
Field identification & locations
Identified by its unique orbicular patterns and variety of colors. Found almost exclusively in Madagascar. It is a highly sought-after material for lapidary work.
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