The National Opal Collection is a store that specialises in Aobao's (Opal), with branches in Sydney and the centre of Melbourne.
Opal, a generic protein stone, also known as Opal, Australian, and Australia's precious stone, is an Australian-specific gem, and The National Opal Collection is a well-known Australian-treasure maker and exhibition, with the features of a shop-style imitation of the Australian-treasure cave. In addition to the Australian treasures that can be seen elsewhere, there are rare Black Opal, Fire Opal, and Boulder Opal.
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