Mr. I. Herr- were lost in the operation. mann, a jeweler of this city, succeeded in find- Cleaving consists in splitting off pieces of a ing among the Dutch who had immigrated to diamond. By inspection striations can be de- this country a number of diamond workers who tected in the rough gem by… … THE FIELD DIAMOND CUTTING MACHINE. stone of any value is work- upon the notch and gives ed is the brilliant. This the back of the knife a DIAMOND CUTTING BY HAND AND MACHINE. '1891 SCIENTIFIC AMERICAN, INC.
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