The glass used to make the sky look real is amazing! I believe all glass in this shade.
Hard to find glass if you seek it out. The item "Bradley & Hubbard Slag glass Lamp Handel Tiffany Empire Miller arts crafts era" is in sale since Monday, October 7, 2019.
This item is in the category "Collectibles\Lamps, Lighting\Lamps\ Electric\Table Lamps". The seller is "thelampislow" and is located in Petersburg, Michigan. This item can be shipped to United States, Canada, Mexico, Bermuda.