Beryl

A group of Green to Bluish-Green precious stones.

The Book of Daniel Chapter 10 of the Holy Bible uses the term Beryl to describe the color of a certain man clothed in Linen.  Daniel said the body was like beryl.

This seems like it must be a person from a long lost race as I know of no people who are colored Green to Bluish-Green (Kind of like the color Aquamarine)