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. I have plenty in 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 I also sell by grain size. Also, as a sample, I can include coarse or fine samples, so please comment if you need them. After washing away the 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 insect feed. For adjusting the acidity of horticultural soil. At home, I mix it with tea or coffee, and I 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% In addition, it contains trace amounts of manganese, boron, zinc, copper, iron, molybdenum, etc. When using it as food for humans and living things, there is no expiration date or best-before date for oyster shells, but please use it within 2 years of opening as a precaution.