28 Cts, Natural Australian Opal Shell, Rub / Rough, Coober Pedy, Beautiful Pin Fire Colour

28 Cts, Natural Australian Opal Shell, Rub / Rough, Coober Pedy, Beautiful Pin Fire Colour. In tact full of colour shell. It has been tumbled it can be set as is or you can work on it some more. Great Specimen for a fossil collector. 29x22x11mm