in known, walnuts are not black, walnuts are white or yellowish, walnut oil inside the black precipitation must be a problem, inferior oil or simply not walnut oil, do not consume, we are here to purchase walnuts is about 18 pounds, a pound of walnuts can be peeled half a pound of walnut kernels, oil content of 65% calculated that you calculate how much your walnut oil know is not walnut oil, hope to be able to help you.