mineral
Ocean Jasper
Silicon Dioxide (SiO2) microcrystalline quartz aggregate with inclusions
Hardness: 6.5-7 on Mohs scale; Color: Pink, white, green, and cream multi-colored patterns; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline/chalcedony); Cleavage: None; Specific Gravity: 2.58-2.91
- Hardness
- 6
- Color
- Pink, white, green, and cream multi-colored patterns
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Pink, white, green, and cream multi-colored patterns; Luster: Vitreous to dull; Crystal Structure: Trigonal (microcrystalline/chalcedony); Cleavage: None; Specific Gravity: 2.58-2.91
Formation & geological history
Formed in volcanic conditions, specifically as silica-rich hydrothermal solutions filling cavities and spherulites in rhyolitic lava flows. Cretaceous period origin.
Uses & applications
Used primarily for ornamental carvings, tumbled stones, polished display pieces, and jewelry.
Geological facts
Ocean Jasper is exceptionally rare because it can only be collected from a specific remote coastal location in Madagascar at low tide.
Field identification & locations
Easily identified by its distinctive orbicular patterns consisting of spherical or multi-colored circular growths within the matrix. Found primarily along the northwest coast of Madagascar.
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