Where does “calcium” come from?

calcium (New Latin) comes from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

calcium (New Latin): genitive plural of calx; calcium

Definitions

Step	Language	Word	Meaning
1	Latin	calx	limestone; chalk; the finish line
2	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble