As one of the Seven Treasures of Buddhism, what is the health-care function of Tridacna in Feng Shui?

Wearing Tridacna

The aura of the human body enters and exits from the left to the right. Generally, except for absorbing gemstones (mainly obsidian and tourmaline), its function is to absorb bad luck and disease from the human body. Except for Qi and turbid Qi, all other gemstones should be worn on the left hand. The Tridacna, Citrine, Red Quartz and Garnet you mentioned are also worn on the left hand.