Drop out like a knife stone, see the loss on loss.

辍学如磨刀之石，不见其损日有所亏。

youdao

Everyone got a chunk of meat which was distributed by a bizarre stone knife.

每个人都得到一大块肉，用一把奇怪的石刀分着吃。

youdao

He dropped the knife and it clattered on the stone floor.

他一失手，刀子当啷一声掉到石头地面上。

《牛津词典》

The knife--originally knapped stone--has been the partner of the needle since the Paleolithic era.

FORBES: Magazine Article

The design is first sketched on paper, and then engraved on stone, in reverse, with a knife.

UNESCO: Culture

Two men accused of plotting to murder singer Joss Stone were carrying a sword, a lock knife, a hammer and notes of their intentions, a court has heard.

BBC: Joss Stone murder plot: Accused pair 'had sword'