Do you know how it feels if you mine and overlook some ores? Probably not 'cause you didn't see them. It hopefully won't happen with this texture pack which outlines the ores. This makes them a lot easier to spot. The outline consists of the colors of the resource you get when mine the ore. An exceptional case is ancient debris. It got outline from the colors of gold 'cause if you mine it, it is the same color as the ore.