Great responses, this is why I don't get why people pay good money to grade bullion, which in time will develop spots! It just doesn't make financial sense to me!! I thought there was a possibility, I was missing something! As I understand, slabs aren't airtight either.
Anyone have any good suggestions on how to delay milk spots? I live in a dry climate which is a bonus. It's a downer to have my favourite bullion coin, the RCM
2011 wildlife wolf develop spots! Especially when a year after release they were upwards of $60 cad an oz, or the moose and bison. It was a wonderful series!
I figured as much it would revert to raw bullion status. So I truly don't understand why grade bullion coins and pay the high prices for MS 70, when given enough time, it's going to develop spots? Is there any bullion coins which have overcome the spotting issue? My reading has suggested it's cause by not thoroughly rinsing the planchette properly, like for proof collectors coins! I figured I'd ask bullion collectors their opinions, as many have a large bullion collection over several years and will see the physical changes to the coins!