What Are Kidney Stones Usually Made Of. Certain fruits and vegetables as well as nuts and chocolate have high oxalate content. They form inside the kidney and can travel to other parts of the urinary tract.
Kidney stones usually originate in your kidneys. Stones vary in size. You might hear your doctor call them renal calculi nephrolithiasis or urolithiasis.
Kidney stones can be small like a tiny pebble or grain of sand but are often much larger.
Some kidney stones are made of oxalate a natural compound found in foods that binds with calcium in the urine to form kidney stones. They develop when there is a decrease in urine or an increase in certain substances such as minerals and salts. Certain fruits and vegetables as well as nuts and chocolate have high oxalate content. Most kidney stones form on the interior surface of the kidney where urine leaves the kidney tissue and enters the urinary collecting system.