Smith, Marcell Nelson, 1854- [from old catalog] · Boston, Mass., Printed for Smith Patterson company by Griffith-Stillings press · leaf 49
alloused by the hot metal to acondition almost like that of leather. After each facet has been polished the dia-mond must be removed and reset before a newfacet can be begun. The patent dop, inventedabout seventeen years ago, which allows thestone to be set at the desired angle and heldby clamps,… … THE DIAMOND POLISHERS WHEEL THE WORKMAN IS ADJUSTING THE dop CONTAINING A DIAMONDPREPARATORY TO POLISHING DIAMOND CUTTING 33 old-fashioned dop of soft metal must still beused. By a perfect diamond is meant in the trade The Perfecta diamond without flaw or spot which can be ^^^°^discovered by using…
Precious stones · Gems
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