Opal - A Historic Journey As some of the most unique and special gemstones in the world, opals are known for their iridescent, fire-like appearance. If you look at opals from a historical context, you will find that throughout centuries, people considered that opals were made up of multiple gemstones and they were a single gem that was a cluster of different stones. This was because of the fact that many opals had radiant patterns and color combinations within them. Read More: https://www.rananjayexports.com/blog/opal-a-historic-journey