An emerald is one of the most precious gemstones in the beryl group (one of the most notable gemstone families). The name is derived from a Greek word ‘smaragdos’ meaning ‘green stone’. This green coloured stone is also considered one of the most valuable of four of all gemstones, which also includes ruby, sapphire, and diamond. Owing to its appeal and the beauty, emeralds are widely used in various ornaments, desirable by many men and women all over the world.