Oyster shell powder, oyster shell calcium powder, oyster shell, borei There are benefits for repeat purchasers, so please let me know in the comments before purchasing if possible. I am also selling the same item on Yahoo Flea Market. 150g is about 220ml. The prices and quantities are as follows. Please tell me the desired quantity in the comments. We have plenty of stock. ●150g: 300 yen ●200g: 330 yen ●300g: 390 yen ●400g: 450 yen ●500g: 500 yen ●750g: 640 yen ●1000g: 760 yen ●1500g: 1000 yen ●2000g: 1260 yen ●3000g: 1700 yen We also sell by grain size. Also, as a trial, we can include samples of coarse and fine grains, so please comment if you need them. After washing with salt, it is heated and dried at around 500 degrees Celsius and sterilized. The main component of oyster shells is calcium carbonate. For calcium supplementation for humans, small animals, birds, reptiles, and amphibians. For dusting and gut loading of insects for food. For adjusting the acidity of horticultural soil. At home, I mix it with tea or coffee, and use it for dusting dubia (Argentine cockroaches) and mixing it into the paste food for toads. Ingredients: Oyster shells (made in Miyagi Prefecture) Alkaline content: 50.0% Nitrogen: 0.2% Phosphoric acid: 0.15% Potassium: 0.03% Calcium: 94.8% Magnesium: 0.40% Silicic acid: 3.09% Other trace elements include manganese, boron, zinc, copper, iron, and molybdenum. When used as food for humans and living creatures, there is no expiration date or best-before date for oyster shells, but please use them within 2 years of opening as a precaution.