We'll be using either Japan Post or DHL to ship your item. It will be shipped from Japan, so it will take some time to arrive. Please note that the prices of the items listed do not include taxes like duties. There may be scratches and dirt caused by age. If an item exceeds the specified size or weight, it may be shipped in multiple packages. ----- This art frame shows a specimen illustrating the growth process of a cultured pearl.  Pearls form when an oyster self-protects itself by covering itself with shell material (nacre) when a foreign object enters its body.  This specimen visually demonstrates how nacre forms as the pearl grows. Nacre is made up of alternating layers of calcium carbonate crystals and proteins, giving the pearl its unique luster.  This specimen, a type commonly found in Japan, is useful for understanding the pearl formation process. You can see where the shell has cracks. Set of 2 18*14*3cm Total 467g (D1930)