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Calcium is found quite abundantly in nature but mostly as fluoride, gypsum and limestone.Although found in the bones of mammals, to be gathered in quantity,It has to be mined or quarried from the ground. It's actually the fifth most common element in the Earth's crust, making it the cheapest form of supplement salt.
It was discoved in 1805 in Cornwall by Sir Humphrey Davy and the extensive mined areas in South East Cornwall rendering huge quantities of calcium for the international market brought income to the locals, and has left a lunar-like landscape. Part has been bought and developed by The Eden Project for its wonderful display of plant life.
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Calcium is the fifth most abundant element in the earth’s crust. It makes up 3.6% of the earth’s crust. In its pure elemental state, calcium is a silvery white alkaline earth metal. It is important to note, calcium is rarely found in the elemental form in nature but it exists in compounds.
It is mostly found in rocks and minerals such as limestone (Calcium carbonate), fluorite (Calcium fluoride), gypsum (Calcium sulphate) and dolomite (Calcium magnesium).
Calcium is also essential for life and it can be found in all organisms, living or dead. Shells of aquatic organisms and egg shells are composed of mostly calcium carbonate.
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