Characteristics related to grain size of rocks are called as texture. Here you can know more about texture of Chert and Andesite. Texture of Chert is Banded, Rough whereas that of Andesite is Aphanitic to Porphyritic. Based on the texture of rocks, they are used for various purposes. Get detailed information about Chert vs Andesite texture, color, appearance and maintenance in the next section.