Gneiss vs Slate - Compare Nature
Gneiss is available in black, brown, pink, red, white colors whereas, Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. Appearance of Gneiss is Foliated and that of Slate is Dull. Properties of rock is another aspect for Gneiss vs Slate. The hardness of Gneiss is 7 and that of Slate is 3-4.