Chalcedony
Description
A sample of chalcedony. The piece is an almost rectangular shaped rock. It is hard and a whitish colour. Some surfaces are smooth and others are slightly rough.
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Object detail
Production place
Classification
Credit line
Chalcedony
is
a
cryptocrystalline
form
of
silica.
It
has
fine
intergrowths
of
mineral
quartz
and
moganite
both
silica
but
differ
in
their
crystal
structure.
Accession number
A100.721
Collection type
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