HIGH TEMPERATURE/HIGH PRESSURE COLOUR CHANGE OF DIAMOND
摘要
<p>The invention provides a method of changing a grey type IIb diamond from grey to blue or enhancing the colour of a type IIb diamond. Selected conditions of high temperature and high pressure are used to produce the colour change.</p>
申请公布号
EP1272266(B2)
申请公布日期
2009.07.15
申请号
EP20010921695
申请日期
2001.04.02
申请人
ELEMENT SIX TECHNOLOGIES (PTY) LTD
发明人
BURNS, ROBERT, CHARLES;FISHER, DAVID;SPITS, RAYMOND, ANTHONY
