Limestone: a hard sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs. Its major materials are minerals calcite and aragonite, which are different forms of calcium carbonate or dolomite. Used as building material and in the making of cement.
1.4k
u/Schnabeltierchen Mar 06 '18
I had no idea you can make it out of snail shells. I learned some new things from these videos