Know all about Marl and Blue Granite properties here. All properties of rocks are important as they define the type of rock and its application. Marl belongs to Sedimentary Rocks while Blue Granite belongs to Igneous Rocks.Texture of Marl is Earthy whereas that of Blue Granite is Phaneritic. Marl appears Rough and Dull and Blue Granite appears Shiny. The luster of Marl is dull while that of Blue Granite is subvitreous to dull. Marl is available in beige, brown, green, grey, white colors whereas Blue Granite is available in black, brown, light to dark grey, white colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling.