Stoping, by Robert Kaufman
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Blacksmith's forge, Herons Reef, Castlemaine Diggings National Heritage Park
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Old Quartz Mill, Yapeen near Castlemaine, c. 1875 - c. 1930, courtesy of State Library of Victoria.
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Calcining Quartz at the North Cross Reef, Stawell, 3 November 1875, courtesy of State Library of Victoria.
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Quartz reefs were the primary sources of gold in most goldfields. Generally steeply-dipping, they were mined in sections, leaving large slots (called stopes) in the ground where the reef had been. The quartz had to crushed to a fine sand to extract the gold.