I just took last week one of those maybe 5" diameter rings off a wine bottle coaster with a few other pieces of clean sterling to the scrap buyer and it was exactly 30 grams. I have scraped the smaller one before, but they're really thin pieces and don't have much weight at all. Yeah I'm with JD on these and I wouldn't go more then a buck a coaster on those, if even that??. I think I payed 2 bucks each on those before and came up short on the value of silver they yield. That's when I found out I won't be spending much on those anymore. I've passed on them also when I come by them in a TS and they have a price at like 3 bucks each for them, but someone takes them as they don't sit on the shelf for very long.