The extensive beryl group, one of the oldest known mineral families, is renowned for its most famous varieties, emerald and aquamarine—which were first mentioned as early as 79 A.D. in Pliny’s Natural History. Yet, there are other stones in the jewellery market that you may not know belong to the beryl group, like morganite, goshenite, heliodor, red beryl, and even maxixe!