gemstone
Ocean Jasper
Orbicular Jasper / SiO2
Hardness: 6.5-7, Color: Multicolored, often browns, greens, and whites, Luster: Vitreous, Crystal structure: Microcrystalline, Cleavage: None
- Hardness
- 6
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Physical properties
Hardness: 6.5-7, Color: Multicolored, often browns, greens, and whites, Luster: Vitreous, Crystal structure: Microcrystalline, Cleavage: None
Formation & geological history
Formed from silica-rich fluids filling cavities in volcanic rocks, specifically rhyolite. Sourced primarily from Madagascar.
Uses & applications
Commonly used in lapidary arts, jewelry making, and as a collectible gemstone.
Geological facts
Ocean Jasper is known for its distinct orbicular (circular) patterns. It is actually a trade name for a specific type of orbicular jasper found only in Madagascar.
Field identification & locations
Identified by its unique circular 'orb' patterns and microcrystalline quartz hardness. Collectors look for well-defined patterns and vibrant colors.
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