What is a metaphor in "The Storm" and what does it mean?

"The sun was turning the glistening green world into a palace of gems." (Metaphor)

Chopin uses this florid metaphor to impart the world surrounding Calixta and Alcée with a dazzling beauty following the resignation of their flame. As the storm—metaphorical and literal—passes, the verdant Lousiana countryside glistens impossibly.