The sequence from the primary to secondary is carat, colour, cut and clarity. New national standard is more perfect than the old, but there are some defects to be improved.

新的钻石分级国家标准较原国家标准更趋完善，但仍有一些有待补充之处。

youdao

The sequence from the primary to secondary is carat, colour, cut and clarity. New national standard is more perfect than the old, but there are some defects to be improved.

新的钻石分级国家标准较原国家标准更趋完善，但仍有一些有待补充之处。

youdao