Definition of opal dirt in English:

opal dirt

noun

mass nounAustralian

单词	opal dirt
释义	Definition of opal dirt in English: opal dirt noun mass nounAustralian The type of soil in which opals are found. mechanization means the opal dirt can be removed in bulk Example sentencesExamples Down the slope towards Lightning Ridge, the depth to opal dirt was 65 feet. The opal dirt is much harder than on the rest of the field. The mine is lighted by electricity and a power plant inside takes opal dirt back to the surface. A group of barefooted kids have eyes glued to opal dirt brought up from the mines. On the white opal-dirt ridges, you can see the gouger's wives in their cheap flowered cotton pinafores.
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