rough diamond是什么意思

双语用例

• This is in large part due to the greater amount of rough diamond that necessitates additional polishing to create diamonds with this precise optical symmetry.

• He appears as something of a rough diamond throughout the books.

• Until now, this is the highest price on record for a rough diamond.

• They are highly skilled craftsmen or artisans who are responsible for cutting, polishing and transforming a rough diamond into a finished gemstone ready for setting.

• While imports make up relatively small volume, or carats, they drastically increase the value of rough diamond exports.

• The participants include all major rough diamond producing, exporting and importing countries.

• Its borders make a rough diamond shape on a map.

• When found, the rough diamond weighed 25.95 carat.