Expand is a combination of the Latin words ex-, meaning out, and pandere, to spread. The idea of spreading out was always there, though the current idea of something actually becoming larger was first recorded in the mid-17th century.
Aragonite and calcite are two minerals formed from calcium carbonate (CaCO. Lime (calcium oxide) is produced by heating limestone or seashells (calcium carbonate). The chemistry of calcium carbonate is similar to that of sodium carbonate and potassium carbonate except that calcium carbonate is not soluble in water.
Calcium oxide can be made by burning calcium carbonate, which comes from naturally occurring limestone or seashells. Other cultures use wood ash, lye (sodium hydroxide), washing soda (sodium carbonate), or baking soda (sodium bicarbonate), both of which occur naturally in some mineral deposits.