Rubies have always been an essential part of royal insignia and other famous jewelry. Until the beginning of the 19th century, red spinels were thought to be rubies. This little-known gem, spinel, is so similar to the ruby that many of the great rubies of history are now classified as spinels. Large red gemstones found [...]
Tags: british crown, crown jewels, gemstones, july birthstone, rau ruby, rubies, ruby, ruby vs. spinel, spinel





