<prompt> Regarding stones in gallbladder the following are true exceptMixed stones are common in the westIn saints traid diveiculosis of colon and hiatus hernia coexist90 of GB stones are radiopaqueIs a risk factor for development  <response>: Cholesterol stones are Radiolucent stones Majority of stones pigment and Mixed stones are radiolucent So almost 90 are radiolucent not Radiopaque Ref: Sabiston 20th edition Pgno :1494 