Small Antique Millstone Fountain – Stone Forestapprox 11h x 20w x 20d inches 150 lbs Each is unique; size and color will vary. Originally used for grinding grain, these antique millstones are about 100 y.antique line millstone in zambia,Millstone: Antiques | Antique Hand Hewn Well Cover Stone Not A Grist Or Mill Stone. $350.00. Buy It Now. or Best Offer . I think the stone is line. If you examine the photos you.