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Color:
metallic silver with dull brassy
modifier
Durability:
Fair
Localities:
Found world wide
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Pyrite
or Marcasite
FeS2
(iron disulphide)
Marcasite
is a misnomer, referring to the mineral pyrite when it is
faceted into small reflective stones and used in jewelry.
Marcasite and pyrite are both iron disulfides but they are
different minerals because they crystallize in different
systems and form under different geologic conditions. Marcasite
isn't suitable for use in jewelry because it is unstable
and can decompose in the air, appearing to acquire a chalky
coating. Pyrite is named after the Greek word for fire as
it produces sparks when struck by iron. Pyrite crystallizes
in the cubic system and can form perfect cubes with shiny
metallic gold faces. Native Americans believed that pyrite
"mirrors" allowed you to see inside the soul.
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