It is the red variety of the beryl group. Some people improperly call it « red emerald ». This commercial name is forbidden, the name of « emerald » being strictly reserved for the green beryl containing chromium or vanadium.
The name was changed to "red beryl" to avoid confusion with the Bixbyite.
Red beryl was discovered in the topaz deposits of Utah. It is the only mine where gem quality crystals are found.
To learn more about the mineralogy of the Bixbite or red Beryl, see mindat.org.
