. • • • • India • • • • •• Australia ... • • •• Fiji .. • • • • New Zealand • • • • I •• • • • •...req11ire fine-grinding, but this is seldom done at the mine . .British mines working barytes practise mineral...Nevada, little of the mineral needs treatment at the mine, the bulk being taken direct to the crushing and...the barytes, which has been concentrated at the mine by hand-picking and washing processes, to ordinary... In Great Britain, the Settlingstones witherite mine, near~ Hexham, Northumberland, has one of the most |