Know all about Adakite and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Adakite and Tachylite belong to Igneous Rocks.Texture of Adakite is Porphyritic whereas that of Tachylite is Vitreous. Adakite appears Dull and Soft and Tachylite appears Glassy. The luster of Adakite is grainy, pearly and vitreous while that of Tachylite is resinous. Adakite is available in black, brown, light to dark grey colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Adakite are commemorative tablets, pottery, used in aquariums and that of Tachylite are cemetery markers, creating artwork.