Gallbladder Stones

Your gallbladder is a small organ below the liver in the upper right abdomen. It’s a pouch that stores bile, a green-yellow liquid that helps with digestion. Most gallstones form when there’s too much cholesterol in the bile.

According to Harvard Health Publications, 80 percent of gallstones are made of cholesterol. The other 20 percent of gallstones are made of calcium salts and bilirubin.