This infographic includes four different types of rubies including the very rare and highly sought after Burma and Pigeons blood, as well as the always desirable Carved and Star Ruby. Find some of these great engagement rings in Hatton garden. Owning a ruby piece of jewellery, particularly one that is as naturally created with no enhancements, should be treasured as a most important jewel as it is one of the most prized gemstones of all.