Can excess calcium cause kidney stone?

Calcium: If you are talking about excess calcium in your blood, the answer is yes.

Yes and no: Most kidney stones are due to calcium stones. For that reason, taking too much calcium increases your risk of a kidney stone. However, we cannot predict if someone will get a stone. Some people with higher calcium levels will not get stones while somebody with lower calcium levels can get stones, so it is hard to say if excess calcium will cause a kidney stone.