Dop : Device for holding diamond during the process of cutting and polishing.
dwt.: The abbreviation for pennyweight, a unit of weight for precious metal.
E Top ...
dop A cutter's holding device used while polishing diamond. The dop would be held by the tang. In some automated diamond cutting systems the dop and tang are incorporated into one design.
Dop
A holder for diamonds while they are being cut and polished, originally made of solder, modern ones are controlled by computer to enable further mechanisation, and accuracy of shape.
Double Diamond ...
A dop-stick is a short piece of thin dowel which is used as a handle. A rub is stuck onto the end of a "dop-stick" with jeweller's wax.
The dop is reinserted in the faceting handpiece and carefully aligned, and the same steps (rough cut, fine cut, polish) are performed on the other side of the stone.
The polisher fixes the cut stone firmly in a metallic holder called a dop, which is cleverly designed to hold the stone with much of one side of it exposed.
The spinning lap provides the grinding and polishing surface, the wooden "dop" sticks to which the rough is adhered, serve to hold the stone in position as various cuts are made.
Theophilus also describes the method for using a "dop stick" by attaching the gemstone to a "long piece of wood of comparable thickness" using "chaser's pitch," then rubbing the stone on a wet "piece of hard sandstone, ...
Shaping: The shaper uses a special type of heat activated resin to affix the pre-formed gemstone onto a metal rod, commonly called a dop stick.
The process is started by adhering the crystal to the dop stick and pre-forming the basic shape of the gemstone.
Cutting the emerald into a rough shape readies the emerald for the long polishing process.
Face (a) A term used in brillianteering for the entire group of facets that can be placed won a diamond without reposition it in the dop; vis., two star facets and four upper-break facets or four lower-break facets.
Bruting is done by affixing the diamond to a dop stick, and shaping the stone with a diamond-tipped cutting tool (the brute).
The stone is held in a lathe, or cutting machine, and another diamond, called a sharp, which is affixed to the end of a long dop that is supported by the hands and under an armpit, is brought to bear against the stone behind shaped.
An instrument used for manual polishing of diamonds. Comprises of three parts known as the dop, stem and legs.
Tolkowsky cut ...
 See also: Cut, Polish, Diamond, Stone, Polished
  
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