The price of pure silver per gram is about 60 cents. The price of a 1 gram stainless steel slotted mass from Wards Scientific (an educational supply company) is $ 15.20. That 25 times more expensive than pure silver. 15 dollars would even get you half a gram of platinum, the second most expensive precious metal after gold. I think I’ll buy some pure silver and make our physics lab masses out that.