1893T. ReunertDiamonds & Gold 55For a time the blue ground remains on the floors without much manipulation. The heat of the sun and moisture soon have a wonderful effect upon it.
1899R. DevereuxSide Lights on S. Afr. 147An endless stretch of sad grey fields, surrounded by high walls of barbed wire, topped by huge electric light globes. These are the ‘floors’ over which the blue ground is spread, as soon as it is taken from the mine.
1937H. SauerEx Afr. 47The De Beers’ Company had to buy the bulk of their own diamonds from the natives whom they employed on the ‘floors’.
1946S. CloeteAfr. Portraits 129The bluish indurated mud is..spread out on floors, where it is allowed to rot for two or three years during which time it oxidises and disintegrates from exposure.
1956L.G. GreenThere’s Secret Hid Away 80The diamond-bearing ‘blue ground’..was spread on ‘floors’ for a year so that the weather might break up the rock.
1973A. HockingDiamonds 7Great stretches of the nearby veld were cleared and levelled and the mined ground was spread over these ‘floors’.
1989P.E. RaperDict. of Sn Afr. Place Names 162Floors, Suburb of Kimberley...Established in 1948, it received its name from the old diamond ‘floors’ on which it was laid out.
flat surfaces in the open air upon which diamondiferous rock was spread, to be broken down over several years by natural weathering.
Hence flooringnoun, the process of breaking down diamondiferous rock on the floors; also attributive.
1931G. BeetGrand Old Days 99As the Kimberley mines became deeper the blue ground became harder and less amenable to the flooring treatment...It was decided in 1920 to abandon flooring..in favour of stage crushing and washing.
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