Know all about Comendite and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Slate belongs to Metamorphic Rocks.Texture of Comendite is Porphyritic whereas that of Slate is Foliated. Comendite appears Foliated and Slate appears Dull. The luster of Comendite and Slate is dull. Comendite is available in blue, bluish - grey colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Comendite are cemetery markers 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.