I've been looking at the Diamonds sold by Provident. I think I may buy one or two but I'm not sure if its worth it. Pros/Cons? Also, how would I value these? With bullion I can just look at the spot prince but how do I find the actual value of the diamonds? This is one of the items I'm looking at: https://www.providentmetals.com/diamond-melee-certicard-vs-10-15-points.html Their buyback price (939) is only $60 under their sale price so is it correct to assume that the value of these as just bullion is at least $940?