Glass in a state of fusion.

The basic glass mixture, particularly when molten

Colored glass, known as "metal" was made by adding various metallic oxides to the crucibles ("pots") in which the glass was melted. This is the basic stained glass of a single colour.

Molten glass ready for working.

a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten; "brass is an alloy of zinc and copper"

a term glassmakers often use when referring to glass.

A term frequently used as a synonym for glass. It is misleading because glass is not a metallic substance, and its use is discouraged.

old fashioned glassworkers' term for glass.

glass in either its molten or hard state. IGCB

The material subjected to an operation of a forming class type. An elemental metal or alloy of metal mixture in a self-shape-sustaining state (this excludes molten, gaseous, or powdered).