In fine chocolate, there is a thing called the unique particle size. If the chocolate particle size is too large, you get a gritty, sandy type of chocolate. Conversely, if the particle size is too small then the chocolate tastes greasy and slimy, which is not pleasant either. What you’re looking for is a particle size which is just right so that when you eat the chocolate and it melts in your mouth, there should be some resistance as you push it around your mouth with your tongue. Now try these chocolate samples and see if you can make out this distinction.