Boulder Opals are the 2nd most expensive type of Opal next to Black Opal. Majority of the Boulder Opal fields are located in Queensland Australia. They are a bit more challenging to find compared to the other types, therefore knowing what to look for is key to a successful noodling trip. Pipe Opal, Matrix Opal,Nut Opal, Opalized Fossils are just a few names or types of Opals that came from this area.
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