This is crushed eggshell. The Ziploc bags are reused. The weight is approximately 1000 grams. These were sun-dried in the shade of a veranda. Previously listed as 700g or 850g, they have been combined to approximately 1000g. There are two bags of approximately 500g each. As shown in the photos, the weight of the bags has been taken into consideration during measurement. There may be some error, so please consider the approximate capacity. The scale shown in the picture is not included. Shipping is planned via packet post seal, and will be packed in a reused envelope. Please be aware of this beforehand.