Kidney Stones Urinary Oxalate. In tubular fluid oxalate can combine with calcium to form calcium oxalate stones. Continued calcium phosphate stones.
There are four types of kidney stones. These form when calcium in the urine combines with the mineral phosphorus. Humans do not have an enzyme capable of degrading oxalate therefore it must be eliminated by the kidney.
Calcium oxalate uric acid struvite and cystine.
Ureteric calculi and bladder stones for further discussion of these. Kidney stones may not cause symptoms until they start to move through your urinary tract. Kidney stones are small hard deposits of minerals usually calcium oxalate crystals that form in your kidney and pass through your urinary tract. A kidney stone is a hard object that is made from chemicals in the urine.