AUSTRALIAN
OPAL
Australian Opal Jewellery:
Allgem Jewellers stock Solid Black, White, Crystal and Boulder Opals. We have a large
selection of loose stones as well as a big range of Opals set into Rings, Pendants, Earrings, Bracelets and Brooches.A
selection of Triplet Opal Jewellery is available!
Solid: natural, untreated and not enhanced in any way other than by
cutting and polishing.
Doublets: are made from a thin slice of translucent opal, painted black
on the base and joined to a backing with a strong adhesive.
Triplets: are of similar construction but have in addition a clear dome
on top.
There are four factors that determine the value of an opal:
- The type of opal
- The play of colour displayed
- The pattern of colour patches
- Its brilliance
Generally black (or dark) opal is regarded as the rarest and most precious variety followed by boulder and light (with the exception of the crystal variety).
The greater the range of spectral colours visible the more precious the opal, an opal displaying violet through to red is rarer than one only showing blue-green colours.
The more uniform the size and distribution of patches of colour across the stone the more valuable. There are several different patterns including the harlequin and pin fire that are the most sought after varieties.
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