Tridacna (砗磲) is the most white substance in the world, it is also a rare organic gemstone used in Buddhist relics. From a gemstone point of view, the Tridacna clam shell has a pearl lustre and is glossy but has a pure white colour, only the glossy and delicate textured clam shell can be chosen to make tridacna jewellery.
Known as one of the "Seven Treasures of Buddhism of the Lotus Sutra", Tridacna can stabilize mood, eliminate worry, balance mental and physical states, soothe frightened nerves, and help insomnia.