Kidney stone is formed by the deposition of calcium salts in kidney.
True
A kidney stone is a solid, pebble-like piece of material that can form in one or both of the kidneys when high levels of certain minerals are present in urine. Kidney stone can be crystallized chemicals like uric acid, calcium oxalate, and calcium phosphate. It causes abdominal pain, blockage of urine, dizziness, vomiting etc.