Ocean Jasper

Trade name for a jasper with spherical inclusions.

Ocean Jasper Shop

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ozeanjaspis ozeanchalzedon ocean jasper ocean chalzedonyozeanjaspis ozeanchalzedon ocean jasper ocean chalzedonyozeanjaspis ozeanchalzedon ocean jasper ocean chalzedony

Origin of Name: named "Oocean" jasper by an American mineral dealer because the first known deposit was located very close to the sea.

Synonyms and trade names: mineralogically correkt: orbicular jasper, translucent or semi-translucent specimens should correctly be termed ocean chalcedony or orbicular chalzedony

Localities: the most important sources are located on Madagascars west coast, near the villages of Moravato and Kambaby. Apparently the Moravato deposit is already depleted (Spring 2015).


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ozeanjaspis ozeanchalzedon ocean jasper ocean chalzedonyozeanjaspis ozeanchalzedon ocean jasper ocean chalzedony
ozeanjaspis ozeanchalzedon ocean jasper ocean chalzedonyozeanjaspis ozeanchalzedon ocean jasper ocean chalzedonyozeanjaspis ozeanchalzedon ocean jasper ocean chalzedony
ozeanjaspis ozeanchalzedon ocean jasper ocean chalzedonyozeanjaspis ozeanchalzedon ocean jasper ocean chalzedonyozeanjaspis ozeanchalzedon ocean jasper ocean chalzedony
Ocean jasper from Madagascar

Other deposits producing jasper with similar inclusions are in the USA (Arizona, California and South Dakota) and in Russia (southern Ural Mountains and wetsren Siberia).

Handling: like all quartzes ocean jasper is sensitive to hydrofluoric acid only.

Ocean Jasper Shop

Gemmological Properties of Ocean Jasper

Formula:
SiO2
Crystal system:
trigonal
Mohs hardness:
6.5-7
Specific gravity:
2.58-2.91
Refractive index:
birefringent 1.543-1.554
Max. Birefringence:
0.009
Dispersion:
0.013
Pleochroism:
none
Luminiscence:
inert
Lustre:
vitreous
Cleavage:
weak
Fracture:
conchoidal