Tridacna is an organic gem material formed from the shell of giant clams belonging to the Tridacna family, some species of which can grow to more than a metre in length and weigh several hundred kilograms. Its smooth white appearance and natural lustre have made it valued for carvings, beads and decorative jewellery.
Traditionally, Tridacna is associated with calm, wisdom, protection and positive energy. It is believed to help quiet the mind, encourage inner peace and create a sense of grounding and balance.
Because Tridacna is composed mainly of calcium carbonate, it is relatively soft compared with mineral gemstones and should be handled with care. I would remove claims about boosting metabolism, preventing osteoporosis or anti-ageing, as those are medical claims without reliable evidence.
Tridacna is a Semi-Precious Material
Tridacna is an organic gem material derived from the shell of giant clams in the Tridacna family, including Tridacna gigas, the largest living bivalve mollusk.
Its shell is composed mainly of calcium carbonate, giving it a smooth white to ivory appearance with a soft natural lustre. Tridacna is relatively soft, measuring around 3–4 on the Mohs hardness scale, so it can scratch or chip more easily than many mineral gemstones.
Giant clams are found in warm tropical waters of the Indian and Pacific Oceans, including areas around the Philippines, Indonesia, Malaysia and the South Pacific.
Because giant clams are internationally regulated under wildlife-trade laws, genuine Tridacna material should only be sourced and traded with proper legal documentation.