mineral
Orbicular Jasper (Ocean Jasper)
Silicon Dioxide (SiO2) with various inclusions
AI-generated identification · may be incorrectHardness: 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
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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.
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