**Gallbladder Stones: An Overview** Gallbladder stones, also known as gallstones, are small, hard deposits that form in the gallbladder, a pear-shaped organ located beneath the liver. The gallbladder stores and concentrates bile, a digestive fluid produced by the liver that helps in the digestion of fats. When the balance of substances that make up bile is disrupted, it can lead to the formation of stones. **Types of Gallstones** 1. **Cholesterol Gallstones**: These are the most common type, making up about 80% of all gallstones. They form when there is too much cholesterol in the bile. Cholesterol gallstones can vary in size and may be yellow-green in color. 2. **Pigment Gallstones**: These stones are smaller and darker, composed mainly of bilirubin, a substance produced from the breakdown of red blood cells. Pigment stones can be black or brown and are often associated with conditions that increase the amount of bilirubin in the bile, such as liver cirrhosis or certain infections

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