Designs such as this one are created by painting and layering different colored glass powders and enamels onto glass panels. The layered glass is melted in a kiln and usually requires multiple firings at different temperatures.  Color intensity changes as the sunlight filters through it. 
 

Poppies on amber

SKU: 2010-03
$68.00Price
    • Glass Panel Size: 8.25 x 4 in
    • Mounting Sold Separately (see options below)