Diamonds and precious stones, a popular account of gems .. . Fig. 98.—Cubic System. Fig. 99.—Regular Octahedron. derived forms ; and when the cutting of diamondsbecame known in the Indies, it was necessarily dia-monds of this class that had to be operated upon.

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectgems, booksubjectprec