What are gallstones made of?

What are gallstones made of?

Gallstones are made up of hardened materials in your body. Typically, there are two types:

• Cholesterol: Made up of fatty substances in the blood, cholesterol is found throughout the body. These are the most common type of gallstones.
• Pigment Stones (mainly made of bilirubin): This substance is created when red blood cells break down in the liver. Too much bilirubin can actually leak into the bloodstream and cause the skin and eyes to turn yellow (jaundice).

Gallstones that are made up of cholesterol tend to be greenish in color. It is more common to have gallstones made of cholesterol than other types of stone.