|
New Page 1
|

|
|
| Home ::
Gemstones :: Opal |
 |
|
OPAL : The name Opal was
probably derived from Sanskrit “upala“, meaning ”valuable stone“. This was
probably the root for the Greek term “opallios”, which translates as “colour
change”. In the days of Roman antiquity there existed a so-called “opalus”, or a
“stone from several elements”. This is the variety which has been known and
used for the longest time, and was up to the end of the nineteenth century, the
noble Opal par excellence, praised by Pliny and Elder as the ultimate in
gemstone, due to its marvelous and mysterious qualities. Opal is unmistakable,
more immediately recognizable than any other gem. All of
Nature’s splendour seems to be reflected in the manifold opulence of fine Opals:
fire and lightnings, all the colours of the rainbow and the soft shine of far
seas. Numerous
legends and tales surround this colourful gemstone, which can be traced back in
its origins to a time long before our memory, to the ancient dream time of the
Australian aborigines. It is reported in their legends that the creator came
down to Earth on a rainbow, in order to bring the message of peace to all the
humans. And at the very spot, where his foot touched the ground, the stones
became alive and started sparkling in all the colours of the rainbow. That was
the birth of the Opals.
Up to the first half of the 19th century, Opals were relatively rare. But then
their career boomed suddenly and made them one of the most popular gemstones,
and the start of this development brought them to the gemstone cutters of the
gemstone centre of Idar-Oberstein. In the era of Art Deco the Opals experienced
their flourishing, with contemporary gemstone artists preferring them to all
other stones because of their subdued charm, which in turn was excellently
suited to be combined with enamel, another very popular material of those days.
When Opal experts talk about “harlequin”, “church windows” or “needle fire”, do
not be surprised. They are probably discussing Opals. The play of colour in this
stone is described with many imaginative terms for various structures and
phenomena, like, for example, “flame opal”, “lightning and peacock opal”, or the
above named “harlequin” and “church window”.
|
| Appearance
: It has a whitish to light grayish, dull yellow, light blue-gray, or
pale-blue ground colour. Opal is unmistakable, more immediately recognizable
than any other gem. |
| |
| Occurrence
: Occurs in the SEDIMENTARY ROCKS. This gem is mined from
Czechoslovakia, Australia, China, Brazil, U.S.A, Indonesia, Japan. |
| |
| Substitutes
: The gem has many substitutes as Synthetic Opal, Composite Opal,
Slocum Stone, Plastic. |
| |
| Chemical
Composition :
HYDROUS SILICON DIOXIDE. |
| |
|