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