askpari ♦ June 14, 2012 ♦ 4 Comments
Marble comes from limestone that has been changed by heat and pressure. The rock we call marble is really made-over limestone – it is a metamorphic rock. That is, it began as one kind of rock and later changed into another kind. Ages ago the skeletons and shells of countless billions of tiny sea creatures …
askpari ♦ April 23, 2010 ♦ 3 Comments
Coral is hard, rocky material formed in the sea from the limestone skeletons of many tiny sea creatures called coral polyps (pronounced PO Lips). A coral polyp builds its limestone skeleton around its soft body. The limestone is made from chemicals present in sea water. Only the polyp’s mouth and tentacles reach out of the …
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