which countries are the major producer of this element?
China, Russia, United States
Calcium
The major producers of calcium are China (about 10000 to 12000 tonnes per year), Russia (about 6000 to 8000 tonnes per year), and the United States (about 2000 to 4000 tonnes per year). Canada and France are also among the minor producers. In 2005, about 24000 tonnes of calcium were produced; about half of the world's extracted calcium is used by the United States, with about 80% of the output used each year. 
where does the majority of maple syrup come from Canada from which trees is this syrup made? Sugar maple (Acer saccharum), the black maple (A. nigrum), and the red maple (A. rubrum) why these trees are used to make this syrup? Because of the high sugar content (roughly two to five percent) in the xylem sap of these species. what nutritional values it provides? Water, carbohydrates (sugars), manganese, riboflavin, zinc and calcium can you tell me the physical characteristics of the last element from the above list? Melts at 842 °C, boils at 1494 °C,  density is 1.55 g/cm, Calcium is harder than lead
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Calcium [SEP] Occurrence and production
Among the other important minerals of calcium are gypsum (CaSO·2HO), anhydrite (CaSO), fluorite (CaF), and apatite ([Ca(PO)F]). The major producers of calcium are China (about 10000 to 12000 tonnes per year), Russia (about 6000 to 8000 tonnes per year), and the United States (about 2000 to 4000 tonnes per year). Canada and France are also among the minor producers. In 2005, about 24000 tonnes of calcium were produced; about half of the world's extracted calcium is used by the United States, with about 80% of the output used each year. In Russia and China, Davy's method of electrolysis is still used, but is instead applied to molten calcium chloride.