ores encased in sandstone, grimstone, ect

When Ever I mining in the desert and see a piece of cole covered in stone and the surrounding stone is sandstone it just hurts my head. It doesn't look right so maybe we can have a cole ore variant covered in sandstone. No difference in drops just the looks. and we can also do other stones like grimstone in the newest snapshot, or diorite, andesite, etc. pretty simple idea that's all I want to say really.