One must also consider the durability of these gems and how they are to be worn. Tourmaline is not as durable as ruby, while garnet, although not as hard as ruby, is still quite durable and can be worn in exposed jewels like rings and bracelets. Tanzanite, iolite and benitoite are softer stones which require gentler treatment. They wear better in pendants and earrings. Sapphire, of course, is the best choice for exposed or active jewels, like rings and bracelets, that are worn every day.
Emeralds are beautiful, but quite soft.
Because they are rare and valuable, emeralds should be set in bracelets and rings only if the jewel is designed to protect the gemstone. As for earrings or pendants, emeralds can be worn daily without concern. Tsavorite garnet offers a brilliant, more durable substitute for emeralds at a fraction of the cost. Chrome tourmaline is also a less costly than emerald and is not as fragile. Each gemstone species is affected by these factors in varying degrees.