This episode is brought to you by Conspiracy Theories, a Parcast Original. For more episodes like this one, subscribe to Conspiracy Theories on Spotify, or wherever you listen to podcasts. Diamonds are considered one of the world’s most valuable gemstones. But what if their prices are high due to brilliant marketing and supply monopoly tactics, not because of their rarity? And if that’s the case, are diamonds just a run-of-the-mill gemstone?