Final answer:
Calcium oxalate stones are the most common type of kidney stone that forms due to the precipitation of calcium oxalate crystals. These stones are excreted through the urine and can be passed out through the feces.
Step-by-step explanation:
Calcium oxalate stones are the most common type of kidney stone. These stones form when calcium and oxalate in the urine become highly concentrated and precipitate. The factors that promote the precipitation of calcium oxalate crystals in the urine are associated with low-calcium diets and the role of calcium in binding ingested oxalate in the gastrointestinal tract.
When the amount of calcium intake decreases, the amount of oxalate absorbed into the bloodstream increases. The excess oxalate is then excreted in the urine by the kidneys, where it acts as a strong promoter of calcium oxalate precipitation. Pure oxalate stones are not reabsorbed by the gut and are passed out through the feces.