Unpolished Pebble Tile Unpolished pebble tiles are the same polished pebble tiles inthat they're small rounded stones picked up from several shorelines aroundthe entire world and after which stick with a mesh background to form a 12 by 12 tile.Generally unpolished pebbles originate from Maui, Rio, Sedona and Tahiti and each possess a various color feature although every single pebble round and sleek which has no sharp sides, suitable for floors or walls both in the kitchen and bath areas.