I received an e-mail with a question about the post on melt-ables which is worthy of repeating. The question was what about the small pieces of steel that end up on the top of the melt? Good question! A-lot of jewelry has spring wire in it for clasps or other reasons. First of all when you are buying the stuff you should check if it is magnetic. If it is sometimes it is plated so you don't buy it, sometimes it is plumb karat but the magnet sticks to the end with a catch or some clasping mechanism. Here you have to make an educated guess about how much weight to deduct because something in there isn't gold. Now you're at the refiner and your bar is melted and you notice magnetic pieces on the bar. (Surprise! your refiner has a magnet too) You can estimate the weight and subtract it from the bar weight, but that's a guess and they guess high and you guess low. If the refiner really knows his stuff he will have some phosphorous copper on hand. Great stuff, it will take magnetics into the bar and make it nice and homogeneous so there is no issue. Remember your bar will gain weight so the assay will go down..... same amount of gold is still there. The phos-copper comes in nuggets and 2 ounces added to a 100 ounce karat melt will dissolve maybe 1/2 ounce of steel. I would pull out all of the pieces with magnetic tendencies and do a separate melt. I would be doing this before going to the refiner. Make sure your refiner has phos copper for this purpose and when you have enough for a melt with magnetic karat run it together. If the refiner doesn't have phos copper, regular copper will work but you will have to add more copper because it doesn't get the phosphorous boost to help the melt. Having the melt without floating magnetics is a better way to get a good return but remember you have to pay the customer less for the piece when you buy it too. Be kind, the springs don't weigh that much!