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.