Bladder stones are small masses of minerals that precipitate in your bladder. These develop with urine in your bladder becomes very concentrated causing minerals in the fluid to crystalize. Concentrated stagnant urine is usually the result of not being able to completely empty your bladder. Dr. Carlo Oller, emergency physician, talks about bladder stones. Dr. Carlo Oller Board Certified Emergency Physician Please visit my website, www.DrER.tv make sure you subscribe, comment, and share! That is the best way to show your support.