Talk:Emerald/@comment-31482708-20170829124144/@comment-5642360-20170829142645

How are emeralds not considered gems? It's literally just a beryl (along with aquamarine and morganite) but green. It's an inorganic mineral that has a crystal structure, whose cut and polished pieces are used for jewelry and adornments, literally the definition of a gemstone.

Also, there are four gems in modern usage that are considered the precious gems (with the rest being semi-precious). Those are diamond, ruby, sapphire, and emerald.