The boulder opal miners hold their annual opal show in winton in 1st week July.
Boulder opal is unique only to Queensland.
It only occurs in deposits in weathered sedimentary Cretaceous rocks in the west of the state of Qld .
The Term Matrix opal is where the opal occurs as a network of veins or infilling of voids or between grains of the host rock (ferruginous sandstone or ironstone) Opalised wood and pipe opal is occasionally found also Large opal mines often have several bulldozers over large opal leases and partake in extensive exploration for new opal mining fileds Boulder opals are mined in Queensland Australia.
Most popular mining towns are Quilpie and Winton but opal mines are spread over huge are of thousands of kilometres and many opal mines are 2-300 kilometres from any town and the summers are extremely hot in the outback deserts of Australia.
Boulder opal is formed in veins thru ironstone material and have an exciting arrange of colours and mixtures. Opal can be clean faced opal or have inclusions of natural brown potch, either way most opals are unique.
Source your Boulder opals direct from opal miners and opal wholesalers and dealers for your single gem opal or parcel black opals from Quilpie or Winton Australia
