Learn more about unicorns with these 10 facts about the mythical, magical creatures. Unicorn horns were really, really valuable. At its height, “unicorn horn” was literally worth 10 times its weight in gold. In 1560, German merchants sold a unicorn horn for an astronomical 90,000 scudi—then about £18,000—to the pope. Pharmacies in London sold powdered unicorn horn as late as 1741.