Know all about Dacite and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Dacite belongs to Igneous Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Dacite is Aphanitic to Porphyritic whereas that of Pseudotachylite is Quench. Dacite appears Vesicular and Pseudotachylite appears Dull and Soft. The luster of Dacite is subvitreous to dull while that of Pseudotachylite is vitreous. Dacite is available in bluish - grey, brown, grey, light to dark grey colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Dacite are commemorative tablets, creating artwork and that of Pseudotachylite are creating artwork, gemstone.