As jade is of hard texture, carving is not done with a steel graver, but with emery by way of grinding.

由于玉质地很硬，不能用钢质雕刻刀雕刻，用磨光的金刚砂来雕刻。

youdao

As jade is of hard texture, carving is not done with a steel graver, but with emery by way of grinding.

由于玉质地很硬，不能用钢质雕刻刀雕刻，用磨光的金刚砂来雕刻。

youdao