Porcelain Jasper

Trade name for a breccziated Jasper from Mexico

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Some samples for the variety of patterns and colours of Porcelain Jasper

Origin of name: Porcelain Jasper is a descriptive name because many specimens look as if they were assembled from porcelain fragments.

Synonyms and trade names: Exotica or Sci-Fi Jasper

Localities: near Sonora, Sierra Madre, Mexico

Handling: like all Quartzes Ocean Jasper is sensitive to hydrofluoric acid only.

Worth knowing: for German-speaking geologists and mineralogists the term "Porzellanjaspis" stands for rocks which form when ascending magma takes along fragments of clay and marl as inclusions and subsequently gets fritted at high temperatures.

Porcelain Jasper Shop

Gemmological Properties of Porcelain Jasper

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