Can be classified as:

1.)   Cholesterol
2.)   Calcium
3.)   Mixed
4.)   Fake stones

Gallstones are more common in women than men.

They can vary in size and number.  Can be as small as a stone and as large as a big marble.
Often several can be seen or just a single stone

Cholesterol stones are green, white or yellow in color.
Calcium stones (also can be bilirubin) are usually small and dark in color.
Fake stones are typically a sludge like material

Some risk factors:

   -  Obesity
   -  Age
   -  Female
   -  Rapid weight loss
   -  Pregnancy
   -  Movement of grudge through gallbladder
   -  Body chemistry
   -  Glucose intolerance
   -  High intake of carbohydrates.
   -  Constipaton

While exercise, high-fiber diet, and low carbohydrate diets all help reduce your risk

Symptoms:

   -  Typically an individual has no symptoms initially
   -  Can be discovered on routine radiographic studies.
   -  10-20% have pain in abdomen generally or specifically on the right side
   -  Pain can follow meals
   -  Pain may radiate to shoulders [between shoulder blades]
   -  Nausea
   -  Gas
   -  Bloating
   -  Chills
   -  Fever
   -  Jaundice

Treatment:

   -  is not always required
   -  laparoscopic procedure may be needed
   -  Drinking water prior to meals may be beneficial
   -  ursodeoxycholic acid
   -  Lithotripsy
   -  ESP
   -  ERCP
   -  Removal of Gallbladder