There are two minerals that have no apparent cleavage. In reality, both have excellent one directional cleavage, but each is so fine grained that the cleavage is only visible under a microscope. It is suggested you read both descriptions and select the one that fits the best. There is one simple test. Run your fingers over the mineral, does it feel slippery or greasy? If so CLICK HERE. If not, does the mineral appear to be dull, chalky white and perhaps smell earthy? If so CLICK HERE. In either case look at both mineral descriptions and pick the one that fits the best.