Terahertz Stone Beads Strands, Faceted, Round

Size: about 2mm in diameter, 2mm thick, hole: 0.5mm; about 188pcs/strand, 15.9 inch.

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.