Know all about Tachylite and Ijolite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Ijolite belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Ijolite is Earthy, Granular. Tachylite appears Glassy and Ijolite appears Banded and Foilated. The luster of Tachylite is resinous while that of Ijolite is greasy to dull. Tachylite is available in black, dark brown colors whereas Ijolite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Tachylite and Ijolite are cemetery markers, creating artwork.