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WHAT IS OCEAN JASPER:
Ocean jasper is a rare and colourful material from Madagascar.
It has long been described as a variety of orbicular jasper.
Found on the north west coast of the world's fourth largest island, the original material is now completely mined out.
Orbicular jaspers are known for their orb-like or small spherical markings.
Stones can be found in many countries around the world but the variety correctly known as kabamby ocean jasper is unique to Madagascar.
The colours are caused by various mineral inclusions.
Red comes from iron in the form of hematite, yellow or grey is clay and shades of brown tend to come from goethite.
Ocean jasper is a registered trade name for what is now known to be a spherulitic chalcedony.
Chalcedony is a cryptocrystalline variety of quartz.
Cryptocrystalline means its crystals are too small to be seen with the naked eye.
A spherulite is a small rounded body often with a radiating structure made up of fibrous needle-shaped crystals.
They mostly occur in vitreous volcanic rocks.
The greyish white inclusions in snowflake obsidian are spherulites.
In ocean jasper the spherulites sit between grains of chalcedony and quartz.
Metaphysical properties of Ocean Jasper.