公开(公告)号：EP1272264A1

公开(公告)日：2003-01-08

申请号：EP01917362.4

申请日：2001-04-02

申请人： DE BEERS INDUSTRIAL DIAMONDS (PROPRIETARY) LIMITED ,  Spits, Raymond Anthony

发明人： BURNS, Robert, Charles ,  FISHER, David ,  Spits Raymond Anthony

IPC分类号： B01J3/06

CPC分类号： C30B29/04 ,  B01J3/062 ,  B01J2203/062 ,  B01J2203/0655 ,  B01J2203/0695 ,  C01B32/28 ,  C30B33/00

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