You might notice four round markings on the tile that are slightly different in colour than the rest of the Tile. Our Tiles are created using a process called injection molding. We have four injection points in our molds, and those dots you see are the location of the injection points. This is perfectly normal! You might be able to see some flow lines as well, which is also perfectly normal!
Note that these slight colour differences are more apparent on coloured tiles than on the white tiles.