This is a shamisen pick (bachi) made of artificial opal, perfect for Okinawan sanshin. Although it's artificial, it's made from materials manufactured by a reputable Japanese company. The aurora-like pattern is a unique, one-of-a-kind piece, with colors that shift beautifully depending on the light and angle. The colors subtly change depending on the viewing angle, making it endlessly fascinating to look at. However, the dynamic colors are impossible to capture in photos, so the true colors and aurora patterns can only be appreciated by those who actually hold it. Therefore, the photos don't do it justice. The hardness is similar to a water buffalo horn bachi, so if the finger hole is too small, you can adjust it yourself. The color is a dark base with vibrant reds and blues that shift like the Andromeda galaxy. The size is 50mm long, 24mm wide, and the finger hole is 15mm. This is a standard bachi size. Unlike the shorter size used for fast playing, this size is carved from a block of material that originally cost 25,000 yen. As with all the bachi I'm selling, I no longer have any more of this material, so this is the last one. I kindly request that those who are overly sensitive refrain from purchasing. No claims or returns are accepted.