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