Q: How can I remove cat urine stains from slate? A: The best advice about pet urine stains on stone is to avoid them — and the stink that can persist for what seems like forever — by cleaning up ...

Urine crystals form when there are too many minerals in a person’s urine. Crystals in urine may cause no symptoms or may include lower back pain and nausea. When there is an excessive buildup of one ...