Know all about Foidolite and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Foidolite belongs to Igneous Rocks while Slate belongs to Metamorphic Rocks.Texture of Foidolite is Earthy whereas that of Slate is Foliated. Foidolite appears Dull and Slate appears Dull. The luster of Foidolite is subvitreous to dull while that of Slate is dull. Foidolite is available in black, brown, colourless, green, grey, pink, white colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Foidolite are cemetery markers, commemorative tablets, creating artwork and that of Slate are blackboards, commemorative tablets, laboratory bench tops, standard material for the bed of billiard table, standard material for the beds of pool and snooker table, tombstones, used in aquariums, writing slates.