Ruby has long been one of the most sought-after gemstones among European royalty. It was often called “the gemstone of nobles” because of its rich color and rarity. Rubies originating in marble, such as those from Myanmar, the Himalayas, and Northern Vietnam, lack iron, giving them an intense, pure red color. The finest rubies, known as “pigeon’s blood rubies,” are deep red with a hint of purple and are the most valuable in the market.