igneous
Ocean Jasper (Orbicular Jasper)
Orbicular Rhyolite (SiO2)
Hardness: 6.5-7. Color: Tan, brown, and green with circular 'orb' patterns. Luster: Vitreous to waxy. Crystal structure: Microcrystalline quartz (Trigonal system). Non-cleavable.
- Hardness
- 6
- Color
- Tan, brown, and green with circular 'orb' patterns
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7. Color: Tan, brown, and green with circular 'orb' patterns. Luster: Vitreous to waxy. Crystal structure: Microcrystalline quartz (Trigonal system). Non-cleavable.
Formation & geological history
Formed as a silicified flow-banded rhyolite or tuff where silica-rich fluids cooled quickly, creating spherulitic structures. Primarily found in Cretaceous deposits along the coast of Madagascar.
Uses & applications
Predominantly used for lapidary work, jewelry, decorative carvings, and as a popular specimen for crystal collectors and metaphysical practitioners.
Geological facts
Ocean Jasper is only found at two specific locations on the coast of Madagascar, many of which can only be reached by boat at low tide. This specific piece is carved into a polished wand or point.
Field identification & locations
Identify by its distinctive bulls-eye or circular 'orb' patterns and rich earthy colors. It is opaque and very hard. Most genuine Ocean Jasper comes from the Marovato area in Madagascar.
