The state of being glassy.

Of or like glass, especially in being smooth and somewhat reflective. / Including a lot of glass. / Dull; expressionless. / (surfing, of water, not comparable) Lacking any chop; smooth and mostly flat.

(Ulster) Glass marble.

plural of glassy

plural of glassy feldspar

Having a fixed stare and a wide-eyed appearance, due to boredom, lack of emotion, attention or interest, etc.

a non-graphitic form of carbon used for electrodes and high-temperature crucibles

(mineralogy) sanidine