Know all about Variolite and Blue Granite properties here. All properties of rocks are important as they define the type of rock and its application. Variolite and Blue Granite belong to Igneous Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Blue Granite is Phaneritic. Variolite appears Dull and Soft and Blue Granite appears Shiny. The luster of Variolite is not available while that of Blue Granite is subvitreous to dull. Variolite is available in black, brown, light to dark grey colors whereas Blue Granite is available in black, brown, light to dark grey, white colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling.