What is the rarest and most expensive gemstone in the world?
While high-quality Alexandrite and Padparadscha Sapphires from Sri Lanka are incredibly rare, the Red Diamond holds the title for the most expensive gemstone per carat globally. They are so exceptionally rare that only a handful of pure red diamonds are known to exist in the entire world, often selling for over 1 million USD per carat.
Would you like to know more about the traditional gem mining process in Sri Lanka, or perhaps dive deeper into tips for buying gemstones safely?