What are gallstones composed of?

Cholesterol, pigment. Gallstones contain variable amounts of bile pigments, cholesterol, calcium salts, and their core usually consists of bile pigments or mucoprotein, which is secreted by the inner lining of the gallbladder. the composition of gallstones is affected by age, diet and ethnicity. On the basis of their composition, gallstones can be divided into cholesterol stones, pigment stones, and mixed stones.
Cholesterol usually. The most common component of gallstones is cholesterol. Occasionally they are comprised of bile pigments if there is an underlying hematologist disorder such as sickle cell disease. I hope that helps.