Source : Webster's Revised Unabridged Dictionary (1913)

Smalt \Smalt\, n. [It. smalto, LL. smaltum; of Teutonic origin;
   cf. OHG. smalz grease, butter, G. schmalz grease, OHG.
   smelzan to melt, G. schmelzen. See {Smelt}, v. t., and cf.
   {Amel}, {Enamel}.]
   A deep blue pigment or coloring material used in various
   arts. It is a vitreous substance made of cobalt, potash, and
   calcined quartz fused, and reduced to a powder.