vintage art deco executive stone, brass & glass desk lamp

This elegant executive desk lamp is probably from the 1970's maybe 80's. Very heavy. It weights 8 lbs before packaging. No makers mark. It has a white stone base (quartz/granite?), brass frame and a milk glass shade. It measures 16 3/4" tall to the top of the finial. It's 10" wide at the widest part of the frame that holds the shade. The base is 6 1/2" L X 5 1/4" D. It takes a single max 60 watt bulb. Pull on/off chain with ball finial. 6 foot cord. Very nice condition. The brass is spotted and tarnished. The stone base has a few tiny ruff spots along the edges. The milk glass shade is ruff along the edges but I believe that is how it was cut. There is also a small spot on the underside of the shade that look like a bubble that broke when it was blown. The finial at the top unscrews and will be removed for shipping. I ship same or next business day.