Setana/Kuro-matsunai Shell Fossils and Coral Fossils Used: Weathered Shell Fossils, 200g, Water Purification Effect Uses Setana/Kuro-matsunai shell fossils and coral fossils, said to contain somatids, which are known to be truly beneficial calcium. Ancient weathered shell fossils, 200g. 100g is the guideline for 1 liter of water. Made by Shizenmura Foods Co., Ltd. It's a small company that doesn't do much mail order, so I think it's rare. Rich in calcium carbonate. The ingredient list in the photo is for the company's calcium powder, but it's made from the same shell fossils. Fine powder is sold as a supplement as the best calcium. Thank you for viewing. Famous for somatids Good calcium Shizenmura Foods Co., Ltd.