Radium is a geometric repeating sheet glass texture made of a
uniform field of raised rounded lenses each about 1/4" (7mm) in diameter.
When used with iridescent or dichroic coatings, or highlighted with a
contrasting color powder or frit, the pattern is retained even after fusing
or blowing. Radium adds a distinct look to designs ranging from snakeskin to
sushi plates. It's also very attractive when iridized and fused face down
onto a smooth surface.