Shirochogai, silver-lipped pearl oyster, Thick 1mm/白蝶貝厚貝 1ｍｍ厚
Thin silver lip oyster is for mother-of-pearl inlay.
The outside is yellowish-brown, and the inside is pearl white. This is also used as a button and material for other crafts worldwide.
Size: about 30mm*30mm/ 1mm thick The size can be slightly different as it is natural materials.