Gua Sha is a healing technique within Traditional Chinese Medicine that helps boost circulation and increase lymphatic drainage through gentle massage motions. Our hand-crafted tool helps stimulate blood flow within the face and body, making you feel more rejuvenated, relaxed, and radiant than before.Material: Black Obsidian is a volcanic glass, naturally formed by fast cooling lava from volcanoes. In crystal therapy, the stone is believed to have protective energies against mental stress and negative thoughts.