Terahertz Stone Beads Strands, Faceted, Round
Size: about 3.5~4mm in diameter, 4mm thick, hole: 0.4mm; about 98~105pcs/strand, 15.9~16.6 inch(40.4~42.2cm).
Terahertz is a man-made gemstone that is invented by Japanese scientists in order to protect the body against electromagnetic smog and harmful radiation. What's more, it's an artificial stone called silicon, but terahertz stone has stronger prowess.