It is the real deal and it's gray powder, it's limestone.

这是货真价实的灰色粉末，是石灰石。

Alcohol actually has an Arabic origin, al-kohl, a purified gray powder used for cosmetic purposes.

酒精实际上起源于阿拉伯语，al-kohl，一种用于美容目的的纯化灰色粉末。