Diamonds, pearls and precious stones : where they are found, howcut, and made ready for use in the jeweler's art, their composition and value (1913)
Smith, Marcell Nelson, 1854- · Boston, Mass. : Printed for Smith Patterson Co. by Atlantic Print. Co. · leaf 25
g stripped and then placed in a detentionroom provided only with a blanket. Here theyare kept for a period of five to seven days, sothat even if the men swallow diamonds it isimpossible for them to escape with their treas-ures. Finally they are given their old clothes,which have been kept in sacks… … DIAMONDS 17 from the mines the blueground is conveyed tothe floors — large flat areas — where it is leftfrom three to six months, or more, to soften.These floors are very large, those of the DeBeersand Kimberley mines covering two thousandacres. The blueground on the floors is har-rowed by steam…
Precious stones · Gems · Diamonds · Pearls
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