Know all about Theralite and Dacite properties here. All properties of rocks are important as they define the type of rock and its application. Theralite and Dacite belong to Igneous Rocks.Texture of Theralite is Phaneritic whereas that of Dacite is Aphanitic to Porphyritic. Theralite appears Veined and Shiny and Dacite appears Vesicular. The luster of Theralite is waxy and dull while that of Dacite is subvitreous to dull. Theralite is available in dark grey to black colors whereas Dacite is available in bluish - grey, brown, grey, light to dark grey colors. The commercial uses of Theralite and Dacite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.