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Home / Opal Discovery Centre
Why Shop at Costello's
An Opal Mine in the Centre of Sydney!
Our George St, Sydney showroom houses Australia’s only Opal Discovery Centre.
It offers visitors a unique, informative and interactive introduction to opals.
Learn about the three beautiful types of Opal and how they are valued via multi media presentation. Hear stories from the Opals colourful history. See demonstrations of mining methods and even participate in puddling, cutting and polishing of stones.
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