Mineral
Ocean Jasper
Orbicular Quartz (SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: multicolored including brown, yellow, pink, green, white, Luster: Vitreous to dull, Crystal structure: Microcrystalline, Cleavage: None
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: multicolored including brown, yellow, pink, green, white, Luster: Vitreous to dull, Crystal structure: Microcrystalline, Cleavage: None
Formation & geological history
Formed in highly silicified rhyolite or tuff. It is found exclusively along the northwestern coast of Madagascar.
Uses & applications
Primarily used for ornamental purposes, lapidary arts, jewelry (cabochons, beads, pendants), and collecting.
Geological facts
Ocean Jasper is technically a spherulitic chalcedony. The primary deposit can only be seen and mined at low tide.
Field identification & locations
Identified by its distinctive spherical (orbicular) patterns and diverse color combinations. Found only in Madagascar.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary