Brazilian emerald

noun

1. a green variety of tourmaline used as a gem: not a true emerald.
2. a pale yellowish-green beryl too light to be classified as a true emerald.

Example Sentences

Lithia emerald is the mineral called hiddenite; Uralian emerald is a name given to demantoid; Brazilian emerald is merely green tourmaline; evening emerald is the peridot; pyro-emerald is fluorspar which phosphoresces with a green glow when heated; and “mother of emerald” is generally a green quartz or perhaps in some cases a green felspar.

From Project Gutenberg