they are made mainly from calcium and from a few other minerals.
Calcium Carbomate
seashells are rocks. this would be because seashells are made out of minerals and formed by some of the same things as rocks. if you looked close enough at certain shells then you would see that seashells are alike with certain kinds and shapes of rocks.
seashells are made by rocks rubbing together
Seashells are made of animals body. Melded up and made a shell.
Even the Sand Is Made of Seashells was created in 2006.
Water Rocks Sand Minerals Salt Seashells
Seashells are not made out of only carbon. They are a mixture of compounds. Calcium carbonate is a main compound in them.
Magical Seashells.
limestone
no because they are not magnetic and their not made of magnet
Limestone is made up out of fossils of corals and shells from the water.
Mostly calcium carbonate (limestone -chalk).
limestone is mostly seashells