pyrope
noun
py·rope ˈpī-ˌrōp 
: a magnesium-aluminum garnet that is deep red in color and is frequently used as a gem
Word History
Etymology
Middle English pirope, a red gem, from Middle French, from Latin pyropus, a red bronze, from Greek pyrōpos, literally, fiery-eyed, from pyr- + ōp-, ōps eye — more at eye
First Known Use
1804, in the meaning defined above