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I recently sent in some clean 14/20 gold-filled scrap, mostly
partial rings and coil ends from cutting jump rings and messed up
wire from wire wrapping. The refiner reported that it only
contained 41% of the gold that I expected from math calculation. I
expected a result of something less than 100% of the math, but is
41% reasonable?
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First thing would be to check whether your math is based on the

right numbers. For example, did you take the ratio of gold to base

metal in the gold filled (marked things like 1/20th as a weight

ratio, or a percentage of thickness? Did you allow for the fact that

the portion stated as gold in that ratio is itself karat gold, not a

measure of it’s fine gold content?

If your math is based on the correct assumptions, the metal you sent

all the quality you stated, and the refiner really only found 41

percent of the metal you had, then that would be more of a refining

loss than is normal. But I’ll bet there’s some aspect of your

calculations that you’ve missed…

Cheers

Peter Rowe