Answer: smalt

AnswerCrossword Clue
SMALTColored mosaic glass.
SMALTDeep-blue color.
SMALTDeep-blue pigment.
SMALTDeep blue.
SMALTBlue pigment.
SMALTDeep-blue glass.
SMALTDeep blue pigment.
SMALTBlue glass
SMALTBlue pigment
SMALTDeep blue
SMALTDeep-blue pigment
SMALTColoring agent
SMALTA powdered blue glass
SMALTCobalt glass colorer
smalta blue pigment
smaltcoloring agent made of blue glass produced by fusing silica, potassium carbonate, and cobalt oxide, used in powdered form to add color to vitreous materials