... , Awabi, Akoya, Agoya, Banana, Black/Brown/White Mother of Pearl (MOP), Mussel, Paua, River, Trocas, Trocas, Trochus4. Sizes: 4.5-40MM ... , Custom-made based on the Natural Feature of Different Shells5. Thickness: 0.12-3MM ... , Custom-made based on the Natural Feature of Different Shells6. Shapes: Regular and Irregular7 ...