Shale, Slate, Phyllanthus Field How to identify?
Shale, as the name suggests, like a page on the page, each piece is thin, can easily tear
There are sericite luster on the surface of the mantle, and the slate is generally no or not obvious.
Phyllantite: a metamorphic rock with a thousand - like structure. The type of the original rock is similar to that of slate, and shines with strong silk shine on its sheet surface and tends to appear.
Slate is like a board, the lamellae are relatively thick, and the thickness of the slate is between slate and shale, and the rock thickness is generally below 1cm and above 0.2mm.
