Characteristics related to grain size of rocks are called as texture. Here you can know more about texture of Rapakivi Granite and Tachylite. Texture of Rapakivi Granite is Granular, Phaneritic whereas that of Tachylite is Vitreous. Based on the texture of rocks, they are used for various purposes. Get detailed information about Rapakivi Granite vs Tachylite texture, color, appearance and maintenance in the next section.