Know all about Slate and Blue Granite properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Blue Granite belongs to Igneous Rocks.Texture of Slate is Foliated whereas that of Blue Granite is Phaneritic. Slate appears Dull and Blue Granite appears Shiny. The luster of Slate is dull while that of Blue Granite is subvitreous to dull. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Blue Granite is available in black, brown, light to dark grey, white colors. The commercial uses 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 and that of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling.