It is also believed, in Wallachia that the saliva of a balaur can form precious stones.

These patients also have a tendency to form urate stones.

People who are prone to forming stones are advised to eat more vegetables, fruits, whole grains, and beans.

Or it could be a metabolic thing where men excrete more of the substances that form stones.

So far, it is the only animal known that naturally forms stones with any regularity.

This results in urine with high levels of mineral deposits, which can clump together to form stones.

I had a hunch you might get pigs to form oxalate stones by manipulating the pH of the blood, and maybe even to dissolve them.

Selenite (mineral), which also forms rose-shaped stones, called the desert rose.

Eventually these crystals become large enough to form stones in the kidney, a condition called nephrolithiasis.

In some cases, drugs can reduce the tendency to form stones.