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Diamond Adventures in India
by Garry Holloway | Published  3/04/2005 | Travel Logs
Machines for Cutting

Here we can see a rough stone that has been planned using Helium Rough. Two rounds are to be cut around the tiny inclusions. After sawing, the stone would be put on a machine like this one, an auto bruter, which is a type of lathe that has 2 diamonds mounted on the ends of the small steel shafts in very bottom of the top left photo. They are then profiled and shown enlarged on the computer screen above. They are ground on each other until they are fully rounded. Janak is the main supplier of auto-bruters in Surat. Part of his philosophy is to specialize in machines that have computer guidance. These are all hooked into one huge LAN network that enables management control of each step of the polishing program. Sergey's scanner planners are designed with this process control system in mind.

After bruting, Lexus customers use an auto blocker (the next side and plan photo's), This computer controlled machine polishes the main facets on 4 diamonds at a time – each is held on 4 heads that sit on one polishing wheel. Next the stone goes to a hand polisher or Brillianteer, who polishes the final facets and makes precision adjustments using the scanner image shown that is equipped with DiamCalc and ideal-scope software so they can see how the final stones light return and leakage will look after polishing.

 

Article Series
This article is part 2 of a 3 part series. Other articles in this series are shown below:
  1. The Palace on Wheels - The adventure
  2. Diamond Adventures in India
  3. USA Adventures June 2005
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