ONE of a kind ART glass Sculpture Vessel signed DSprague... Layers of glass and many firings in the glass kiln make this ART glass especially unique! You can see the many layers and dimples within the layers. I use crushed glass to create the hand designed image. SO unique and one of a kind! It is very thick and heavy. Fired in the kiln at between 1200 - 1500 degrees per firing. A fun piece!