Leave olive oil mixed with grapefruit juice and some hyrdochloric acid and bile salts in a glass jar and you will see it doesn't conjugate. They are stones. The question is are they soft, light green and your stool a wet dark brown, or are they hard dark green larger than an inch and your stool yellow mustardy colour? If its the latter you might have gilberts syndrome. If its the former, your liver is probably in good shape.