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Opal is formed from a solution of silicon dioxide and water. As water runs down through the earth, it picks up silica from sandstone, and carries this silica-rich solution into cracks and voids, caused by natural faults or decomposing fossils. As the water evaporates, it leaves behind a silica deposit. This cycle repeats over millions of years and eventually Opal is formed. |
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Australia has three major varieties of natural sediment Precious Opal –
- Black Opals from Lightning Ridge in New South Wales
- White Opals from Coober Pedy in South Australia
- Boulder Opal from Opalton in Queensland (near our flagship store).
The many variations of Opal depend on several factors.
In particular, the climate’s wet and dry periods that create a rising or falling water table which concentrates any silica in solution.
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Check out our award winning film, "Boulder Opal Country" to discover more about Queensland Boulder Opal and the small nearby town of "Winton". |
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AUSTRALIAN OPAL DIRECT YOUR SOURCE FOR MINER & MANUFACTURER DIRECT GENUINE OPAL JEWELLERY
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