Now this one is driving me crazy. I purchased a set of double-six dominoes. It has a manual which points to the heaviness of the dominoes. It says that a double-six is the heaviest domino and the double blank is the lightest. The same is said on this website (link) dedicated to dominoes.
Now is it just me or what but Google is not able to tell me which is heavier: a 1-6 or a 3-4. Can an experienced player tell me the answer and the reasoning behind it?