To reiterazatilise, I used the pneumatic winnowing approach right down to a duplication of the equipment which Tanky describes. Some small quartz fragments had sufficient mass to resist flying away. I certainly agree that the greased pan would not be efficient with a large quantity. I think next time the leaf blower for the light chaff and sand and Cary's hydro approach with the corrugated flexpipe for the stubborn remainder. Thanks, Tanky, for the description of tumbling apparatus and operation.
jack
