蓝砂石颜色接近紫色，里边的砂部门为蓝色，故称蓝砂石。

Blue and purple sand color close, while for the blue, sand part blue sandstone said.

youdao

蓝砂石颜色接近紫色，里边的砂部门为蓝色，故称蓝砂石。

Blue and purple sand color close, while for the blue, sand part blue sandstone said.

youdao