The tastiest cuts of beef are often the ones with more fat. But when you're concerned about your health or you're trying to watch your weight, you want the leanest cuts of beef. You don't necessarily have to sacrifice flavor by choosing lean cuts of beef, though. Use this guide on cuts of beef to make smart choices.
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO 3).
Jupiterimages/Photos.com/Getty Images. Limestone is a sedimentary rock composed of a mineral called calcite, which has the chemical formula CaCO3. Together with the dolomites, a related class of sedimentary rocks, limestone makes up some 10 to 15 percent of all sedimentary rock on our planet.he first element found in limestone is calcium; the symbol for calcium is Ca. Calcium has atomic number 20, meaning it has 20 protons in its nucleus.