Glass marble.
Extensively glazed.
Including a lot of glass.
Dull; expressionless; lifeless.
Of or like glass, especially in being smooth and somewhat reflective.
Lacking any chop; smooth and mostly flat.
The glass covering of the face of a watch.
A sandglass.
An item of glass laboratory equipment consisting of a simple, slightly concave circle of glass. It is a general utility item, used to hold small samples, to evaporate liquids, to cover a beaker, and so on.