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