This is an artificial opal bachi (plectrum) for the Okinawa sanshin. Although it's artificial, it's made from materials manufactured by a reputable domestic company, and it's a one-of-a-kind piece with a beautiful aurora pattern. The colors shift and shimmer depending on the angle, so you won't get tired of looking at it. The hardness is about the same as a water buffalo horn bachi, so if the finger hole is too small, you can carve it yourself. The color is white clear with fluorescent green and a hint of blue, and it appears red when held up to the light. The size is 39mm in length, 26mm in width, and the finger hole is 16mm. It's a short type, made for fast playing. The material for this size alone cost 20,000 yen to carve from. We do not accept purchases from those who are overly concerned about details, so please understand that no claims or returns are accepted.