Terahertz Stone Beads Strands, Faceted, Round

Size: about 3~3.5mm in diameter, 2.5~3mm thick, hole: 0.3mm; about 114~141pcs/strand, 15.1~16.4 inch(38.4~41.8cm).

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.