All legitimate diamonds of any value have a "unique" passport, a certificate grading the four Cs – colour, clarity, cut and carat.

所有合法销售的钻石不论价值几何都有一张“唯一的”通行证，这张证书对钻石的四个方面进行评级——色泽、透明度、切割和重量（克拉）。

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Our Stone Warehouse at the Port...? All cut-to-size orders, tiles and slabs, after standard grading, are put in wooden pallets.

关于港口仓库…所有瓷砖和地砖的切削订单，标准分级后，将被放进木货盘里。

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The Gemological Institute of America, for example, is devising software to enable retailers and consumers to compare diamonds of different cuts by grading the cut automatically.

ECONOMIST: MONITOR