Noting that the Atlantic article is 30 years old. More recently I was able to sell a diamond for approx. what someone paid for it roughly 10 or 12 years ago. It didn't appreciate but it didn't exactly loose value over the retail purchase. ymmv for sure but this is one data point from my personal experience. (Gave the diamond ring on consignment to a jeweler and after 2 years it sold not sure what the retail buyer paid but that is what we received for the ring.)
Indeed. If you had invested $10,000 in the total US stock market 10 years ago, you'd have $20,000 now. (And that's with a major market crash in the middle!) So the diamond has actually lost 50% of its value.
