View our collection. High quality stones are very rare. Easily distinguished by the blackness of the background "body AAustralian or body colour. Natural opals 2. Although boulder opal has an ironstone backing, it is regarded as a solid natural opal because this backing occurs naturally.

The variety of natural opal is determined by the two characteristics of body tone and transparency. A triplet opal is a thin veneer of precious light opal bonded to a black backing with a Australiah crystal dome glued to the top. A doublet opal is a layer of precious light opal bonded to a black backing, simulating black opal. Even expensive black opals may have only a very thin colour bar on black potch. Black opal exhibiting bright flashes of red is extremely rare. Natural opals with a base tone ranging from colourless to medium grey are called light opal.

Some people refer to these as "white" although this expression should Groupon Company Number be used where the body colour is very milky. White Opal may be transparent through to nearly opaque, although it usually has a "milky" appearance and has a light body tone or white body colour.

If light is able to pass through the stone, or you can see through an opal, then you are probably looking at a Aushralian opal. Crystal opals can display any colour of the spectrum in a beautiful play of colour. The translucence of a crystal opal often gives it a greater clarity and vibrancy of colour than opaque stones.

Boulder is a variety of precious opal that has the host rock forming naturally as Australian Opal Company of the gem. Often just a thin vein of precious opal is present. It mainly occurs in specific locations over a wide area of Western Queensland. Boulder opal occurs as in-fillings of cracks or voids usually in ironstone boulders. Boulder opal can be black or light depending on the appearance of the stone when viewed from the surface. The popularity of this type has soared since the mid s.

Interesting Australian Opal Company of the diffracted colours are rare and when combined with brilliance, have an enormous impact on the value of the stone. Pinfire and small type patterns are less desirable than broad patterns or large flashes. Distinct patterns such as rolling flash, straw pattern, Chinese writing, ribbon and harlequin are highly sought after. Black Australian Opal Company is characterised by a dark body tone which can range from dark Australuan to jet black.

Because of their dark body tone, the rainbow colours in a black opal stand out much better than lighter opals. Due to their dark body tone and the resulting vibrant play of colour. However, just because an opal is black doesn't make it valuable. There are many factors including brightness and pattern which determine the overal value of opal.

Subscribe Registration Login Basket 0. FAQ Order Callback. About Us. Black Australian Opal with Australian Cooperage Company Pty Ltd red colour. Black Australian Opal with blue-green play of colours. Black Australian Opal with bright green play of colour. New goods. About Aistralian Opals. Australian Opals. About Opals. Types of Opal. Opal Patterns. Types of Opal: 1. Boulder Opal Boulder is a variety of precious opal that has the host rock forming naturally as part of the gem.

Rare Opal Patterns Interesting patterns of the diffracted colours are rare and when combined with brilliance, have an enormous impact on the value of the stone. Black Opal. Crystal Opal. Boulder Opal. Mexican Opal. Harlequin Opal. Sydney, Australia. We accept. Shopping cart There are no products in your shopping cart. Bottom menu. About Us Common info. Opals Black opals White opals Crystal Boulder Austarlian. Information Information. All rights reserved. Site development.

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