opal glass (noun)

1. In the anime series, the magical girl's staff was made of opal glass and glowed brightly when she cast a spell.

2. The haunted mansion had eerie opal glass windows that seemed to trap the souls of its unfortunate visitors.

3. During the Victorian era, opal glass was widely used to make elegant lampshades and decorative vases.

4. In the movie set in the 1920s, the glamorous actress was seen wearing opal glass earrings that shimmered under the spotlight.