Not sure on that one, I don't have a good scale set up here to weigh it. I just measured out into a graduated cylinder until I was up to the right amount after settling occurred. It wasn't much though, if I had to guess I would say maybe 3 grams but awful hard to estimate weights that small.
Should also add I am not a daily metric user, going back to my high school days and them teaching us a gram was roughly the weight of a paperclip so I could be way off!