sedimentary
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
Hardness: 6.5-7 (Mohs scale); Color: Polychromatic blend of pink, cream, grey, and green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91.
- Hardness
- 6
- Color
- Polychromatic blend of pink, cream, grey, and green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Polychromatic blend of pink, cream, grey, and green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91.
Formation & geological history
Formed from rhyolitic volcanic activity where silica-rich fluids cooled and crystallized in a repetitive manner, creating distinctive orbicular (eye-like) patterns. Specifically found in the coastline of Madagascar.
Uses & applications
Primarily used for lapidary arts, jewelry, meditation tools (like points/towers), and as a collector’s decorative stone.
Geological facts
It is only found in one specific location in Madagascar and can often only be mined during low tide. The deposit was first discovered in the 1950s but lost for decades until being rediscovered in the late 1990s.
Field identification & locations
Identify by its unique circular 'orb' patterns and swirling colors. Common in metaphysical shops. In the field, look for a dense, silica-heavy rock that does not scratch easily with steel.
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