Unusual Antique Stained Glass Slag Lamp Shade

Not an expert on these so I do not know how to describe the style… I have been told that the variations in the glass means it is slag glass? THERE IS ONE CRACK IN ONE OF THE SECTIONS (see close up pic) It is approx 11 1/2 ins wide and 6 ins tall And comes as pictured.. The item “Unusual Antique Stained Glass Slag Lamp Shade” is in sale since Monday, July 04, 2016. This item is in the category “Collectibles\Lamps, Lighting\Shades”. The seller is “debbiethebrit” and is located in Lakeland, Florida. This item can be shipped to United States.