Designer mid-century pillar lamps

Hello,

Recent estate sale find. I am trying to find out information about these lamps. They seem to be constructed out of wood and some kind of stone such as granite or metal its hard to tell. They are very solid and heavy lamps. They are 24" tall to the light socket. The pillar is 4.5 inches sq. I was told that they were owned by a wealthy family and purchased from a New York Designer, however they are unmarked. Any information would be helpful. Thank you.