And as it cools, things start to crystallize and the heavy minerals would sink out and the light minerals would float.

当它冷却时，物体开始结晶，重的矿物质会下沉，轻的矿物质会漂浮。

Gneiss has alternate bands of light and dark minerals and can form from a variety of different rocks.

片麻岩具有交替的浅色和深色 矿物带，可以由各种不同的岩石形成。