size doesnt really matter..but bigger crystals seem to have a bit more punch to them..

the thing about moldavite is that even if you arent sensitive to crystals..this one will most likely be noticed...it may feel warm in your hands..or you may feel some energy course through your body..you may get light headed...arkadiancollection.com is a great place with some lovely moldavites...they are expensive stones..but there are only so many because they are from a meteorite..

and sometimes you lose moldavites...sometimes they just disappear..but its part of the stone..i have two..with another on the way..i like having them around..even though i dont like holding them too much