We try to limit the amount of packaging we use and pack multiple gross crystals into a single bag.  The total weight of the single bag will be equal to the number of gross ordered, multiplied by the weight per gross.  For example, 1 gross (approx 144 individual crystals) of Crystal Flatback weighs 7grams.  If you ordered 3 gross, you will have a total of 21 grams in the bag.