I think the wrong chart is listed in your article. There are 2 charts listed on the class action website, and from what I can tell the second chart is the one most consumers will use. I'm referring to anyone who just bought a diamond ring. That chart does in fact show percentages of the RETAIL price, so it would be a percentage of the price you actually paid. But I notice 2 things: first, no matter what chart I use I end up with about the same dollar amount (assuming wholesale price is 50% of retail price). And second, as already pointed out, this is the max you can possibly receive. There is a set dollar amount they are going to distribute, and you will almost certainly get way less than the max amount allowed.

Still, a refund of any kind is nice. I'm filing because, incredibly enough, I still have the payment book from when I bought my wife's engagement ring. I don't know if that constitutes a receipt, but it's worth a try.