High temperature/high pressure colour change of diamond

Details High temperature/high pressure colour change of diamond High temperature/high pressure colour change of diamond

B - Operations, Transporting

01

J

B01J 3/06 (2006.01) C01B 31/06 (2006.01) C30B 33/00 (2006.01)

Patent

CA 2405420

A method is provided for changing the colour of a brown type IIa diamond from brown to colourless. The method involves subjecting the diamond to selected conditions of elevated temperature and elevated pressure to produce the colour change.

L'invention concerne un procédé permettant de changer la couleur d'un diamant marron de classe IIa et de rendre ce dernier incolore. Ledit procédé consiste à exposer ledit diamant à des conditions sélectionnées de température et de pression élevées, de manière que le changement de couleur soit induit.

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