It is a sea turtle necklace of luminous shellfish. The layer of the shell of the turtle is green with the layer of the color of the night shell.
The world's largest turban shell, which has the strongest pearl layer among shellfish, and the rainbow-colored pearl layer is called a rainbow shower, and is prized overseas. It has been used for a long time in Ryukyu Raden crafts in Okinawa. Kaisou no Yokai is a handmade craft by Okinawan artisans.
[* Notes when purchasing] The color pattern of each shellfish product is different, and the product delivered may differ from the color and pattern shown. Please understand.