No. Most gems are radioactive, but these radiations can be ignored and will not cause harm to human body. Natural silkworm fragrance is a long silk fiber made of natural silk. Natural green or yellow-green silk is shiny, soft to the touch, unique and beautiful, and can be woven into gorgeous and luxurious silk fabrics without dyeing, so it has the highest economic value among all kinds of silk and is known as the "green gem" in silk.