All our Artglas products are handmade, one of a kind, fused and fired for up to 24 hours in our studio kilns. Our kilns get as hot as 1800 degrees Fahrenheit and each of our unique pieces is composed of several layers of sheet glass. This glass is cut, stacked, melted, shattered, restacked and remelted again. Using our own special techniques, we can create beautiful layers and designs in our final gems. This process can take up to 4 rounds in the kiln, over 100 hours of heat, and no two pieces ever turn out the same, making every piece your own truly original Artglas.