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    Opal mining has been part of this town since the black opal was first found there in the late 1880s by a rabbit trapper named Jack Murray. However, its full commercial value was not recognised back then and it took till 1908 for the Grawin and Sheep Yard Opal Field to open up and increase the importance of the stone within the district.

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    Most mining is done by opencut mining as well as some underground tunneling. The opal found comprises Light, Dark, Black and Crystal Seam Opal. Mintabie opal is extraordinary hard, sometimes even hard enough to scratch agate. Host rock is a kaolinitic sandstone of probable Ordovician age.

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    Opal Mining Black Opal Direct The most advanced way of retrieving the opal bearing dirt up the hole is by using a machine called a blower. A blower is a inch pipe that is connected to a massive fan on top of the claim that sucks air and rock through the pipes, up the shaft and into a truck waiting at the top.

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    The Hazards of Opal Mining. Opal mining is a dangerous venture, especially for those working alone. Tunnels often don't have enough oxygen, and caveins may occur. Sudden storms can also flood them. Workers face extreme heat above ground and claustrophobia below ground. Furthermore, opals occur hidden in veins, pipes, or kernels within rock.

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    For some types of opal, this will prevent cracking and crazing that could result from rapid drying. With other types of opal, such as limb casts, soaking could cause any remaining wood to expand and crack the opal. If in doubt, consult onsite Royal Peacock Opal Mine staff.

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