re-cutting Many times an old style cut such as the old European or old mine cut will be re-cut (re-fashioned) to improve upon its beauty, salability and value. If a diamond is chipped a full re-cut may be required to improve its salability.
Re-cutting: Refinishing a polished stone to improve its clarity grade or to update and modernize an old style cut.
4. How high are the re-cutting costs?
The costs for modernizing and re-cutting are roughly $100 per carat of the remaining weight.
5. Is there a risk in re-cutting an old-cut?
Many old diamonds lose whatever brilliance they had and re-cutting may revitalize a diamond that has become lackluster.
They can be removed by polished or re-cutting.
Gneiss (n) Part of the later stage of the "rock cycle" (sedimentary metamorphic igneous), ...
Later, in 1962, the same blue diamond was presented for re-cutting to a Belgian diamond cutter named Komkommer. Recognizing immediately that the diamond was probably of great historical significance, he refused to re-cut it.
At that time it was merely surface cut, and was also disfigured with several flaws, so that re-cutting seemed advisable; and it was decided to give it the form of the brilliant.
Avoid heat, steaming, chemicals and ultrasonic; may not be suitable for re-cutting or re-polishing
Andesine
(see Feldspar)
Andalusite ...
Special Care instructions: normal care (skip the goat’s blood); for yellow diamonds, avoid heat and re-cutting ...
Khazaneh withdrew his remarks, saying "Pincione was never at my office on August 27, 1999," and that the plaintiff "never approached me or my company in regards to re-cutting a Pink Diamond or any other diamond for that matter." ...
Sometimes it is called surface diffusion. In this, a layer is created on the surface. This layer is described as colored coating. By re-cutting, polishing or scratching diffused gems may alter in appearance.
Irradiation with a linear accelerator produces a uniform colour, without light or dark patches or spots, throughout the diamond. The colour of an irradiated diamond can be changed by heat, therefore extra care must be taken during repair, re-cutting ...
It is considered permanent, but surface diffusion stones are significantly less valuable than stones with color all through the stone, because if a stone has to be re-cut because of damage or scratching, the re-cutting will remove the thin surface ...
 See also: Diamond, Color, Stone, Gemstone, Gemstones
  
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