Process for the production of a piece of jewellery
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United States of America Patent
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Issued Date -
Nov 25, 2004
app pub date -
May 3, 2004
filing date -
May 23, 2003
priority date (Note) -
Abandoned
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Abstract
A process for the production for a piece of jewellery by casting metal around a precious stone, wherein prior to the casting operation the precious stone is provided with a colouring agent-bearing coating and that during or after the application of the coating, the latter is subjected to an energetic treatment which causes those transformations of the coating which would occur without the energetic treatment upon casting the metal around the precious stone.
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