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Chalcedony
This wide collection of hard, colored, vitreous to
opaque stones (jaspers), is very famous since antiquity.
names like Red jasper, Blood Stone, Chrysoprase,
Petrified Wood,
Carnelian and Agates are just to list few from this big family of
stones used by the Greeks and the Romans in cameos to
celebrate their famous faces.
> technical/details
SiO2 - Silicon Dioxide
Jasper is an opaque,
impure Chalcedony, usually red but also yellow, green,
and grayish blue. Often jasper is multi-colored. Jasper
is a very pretty, inexpensive earth stone. It is usually
worn as beads or cabochons.
Colors
Rich clay red color, with
a slight greyish-black matrix
Care and Treatment
The polish on Jasper will
often be washed away in water. Clean with a soft dry
cloth.
Jasper is often sealed
with petroleum products.
Hardness
Jasper has a hardness
rating of 7.
Specific Gravity: 2.65 -
2.66
Where Found
Jasper is found in
France, Germany, India, Russia, Venezuela and USA
(Arizona, California, Utah and Wyoming).
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