青石的英文：
bluestone

Driving a nail into a stone slab/impossible to penetrate
青石板上钉钉,硬钻

A dichroic violet - blue to gray mineral silicate of magnesium,aluminum,and sometimes iron.
堇青石一种呈介于紫蓝于灰色的二色性矿物，是含镁、铝、有的也含铁的硅酸盐

A gray,green,or brown mineral similar to mica,formed by chemical alteration of other minerals,such as cordierite.
块云母类似云母的灰色、绿色或棕色矿物，由其它矿经化学变化形成，如堇青石