this is the best way to find out if ur getting screwed over or not on a quarter. the first thing is find out how much your coin currency weighs on average in your country. in canada a quarter weighs a lil over 5 grams and a penny weighs a lil over 2 grams, so put together i have roughly 7.5ish grams. so u take a long, flat object (such as a small piece of wood that is even without chunks or anything missing out of it that would throw the balance off.) then u balance this on an object such as a the top of a coke bottle with the cap on so that the weight of the wood is evenly balanced in the middle and it will stay in place without teetering. now with a steady hand take ur weed out of its baggy and hold it above one side of the wood and hold ur change over the other, then place both on the ends at the same time. if the weight is even it should balance. i tried this myself today since i thought i was getting ripped off on a quarter, but as it turns out it evened out, when i add a dime or take a piece of weed off, the weight teeters and falls off the coke bottle, just be careful not to drop a bud on the floor like i did lol. well this works for me maybe itll work for u