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Ch. 18: Cutting and Polishing

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176 THE DIAMOND MINES OF SOUTH AFRICA
faces. Their size and shape are most accurately measured and most exactly ground.
Figs. 9 a, 9 b, 9 c represent, successively, side or girdle, top or table, and back or culet of the next most simple cut of
modern date, which is of a scientific cast. It is called the " single cut brilliant," a modification of the simple table cut. Fig. 10 below represents a single cut having sixteen triangular facets on its upper section and twelve facets on the under
section, plus eight long facets. Figs. 11 and 12 show one of half that number, but both belong to the style here described — the single cut brilliant. Indeed, with very small stones, the single cut has but four faces above and four below. In com­mercial circles they are called " single sets."
The two figures above present another modification of the simple table cut of India. It is called the "step cut." In this style the plane above the girdle is only half as thick as that below the girdle. From Fig. 13 it appears that the part above the girdle has been bevelled off" at two different angles, making two " steps" besides the table. The other figure
Ch. 18: Cutting and Polishing Page of 396 Ch. 18: Cutting and Polishing
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