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Iolite also known as Cordierite in mineralogy is a
magnesium iron aluminum cyclosilicate. The name "iolite" comes from the
Greek word for violet. Another old name is dichroite, a Greek word meaning
"two-colored rock", a reference to cordierite's strong pleochroism. |
As the transparent variety iolite, it is often used as
a gemstone. Gem quality iolite varies in color from sapphire blue to blue
violet to yellowish gray to light blue as the light angle changes. Iolite is
found in Sri Lanka, Burma, Australia's Northern Territory, Namibia, Brazil,
Tanzania, Madagascar, Connecticut, and the Yellowknife area of the Northwest
Territories of Canada |
Apart from the use in gems, Iolite has important use
in automobile industries. In automobile industry "catalytic converters" are
being use to reduce the toxicity of emissions from the internal combustion
engines. This process needs a good thermal shock bearing property in the
material. These catalytic converters are commonly made from ceramics
containing a large proportion of Iolite deliberately align the Iolite
crystals to make use of very low thermal expansion to prevent thermal shock
cracklings. |
Iolite can be
shaped into any beads, Iolite round beads, Iolite oval beads,
Iolite flat oval beads, Iolite Buttons, Iolite drops, Iolite
tube beads, Iolite pear beads, Iolite nuggets, Iolite tumblers,
Iolite roughs, Iolite roundel, Iolite uncut, Iolite tire are
the common beads for jewelries. |
Other useful links………. |
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