Orbicular Jasper also known as Ocean Jasper is often presented in the form of a polished sphere for artifact and jewelry effects. This form of jasper is found only near the ocean on the North coast of Madagascar. The distinct spiral formations are micro-crystallized quartz colored by oxides and impurities. These spherical inclusions arise from the aggregation of slender crystals which form a seed for the shape thus alluding to orbs. Orbicular Jasper exhibits triboluminescence when impacted releasing a hottish orange or yellow light streak.
| Chemical Formula | SiO2 |
| Color | Multicolored, White, Blue, Red, Green, Brown, Gray, Black, Banded |
| Hardness | 6.5Â -Â 7 |
| Crystal System | Hexagonal |
| Refractive Index | 1.54Â -Â 1.55 |
| SG | 2.63Â -Â 2.65 |
| Transparency | Opaque |
| Double Refraction | .009 |
| Luster | Vitreous |
| Cleavage | Indiscernible |
| Mineral Class | Quartz (Chalcedony) |
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