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发明名称
ASSESSING GEM COLOUR
摘要
A method of assessing the colour of a diamond or other gem is provided which comprises determining the proportion of diffuse light incident upon the gem which is transmitted by the gem as well as a device for use in this method.
申请公布号
AU7132881(A)
申请公布日期
1981.12.10
申请号
AU19810071328
申请日期
1981.06.04
申请人
DE BEERS CONSOLIDATED MINES LTD.
发明人
G.S. WOODS
分类号
G01N21/87
主分类号
G01N21/87
代理机构
代理人
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地址
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