You've probably heard before that the diamond market is a little bit fishy. Not only are diamond prices artificially inflated because the supply of diamonds is restricted on purpose, brand names for diamond jewelry have aggressive marketing strategies. Their advertisements are designed to trick consumers into believing that those brands are selling a superior product, which is therefore worth more money, when that isn't necessarily the case. They even make it difficult to comparison shop because they often aren't transparent about the prices of their diamond products.
This guy went to brand name diamond retailers in New York City; he went to Cartier, Van Cleef, Harry Winston, and Tiffany & Co. to do undercover research about what they sell and how much it costs.
Then, he broke down his findings and explained what they all mean...