Twenty years ago, my father came across a lot with 2 rough pieces of "Green Apatite". It was previously sold as Beryl, and the person who had bought it saw it was too soft when he was trying to cut it. The lot was promptly returned and the second known possibility was Apatite. My father always liked the unusual, collector's gems and they looked pretty darn good as Apatites. At that time, people cared mostly about Beryls, Topazes and Tourmalines.
The pieces came from an old man that had it stashed for a while. He said they came from Ouro Verde de Minas Gerais, a small municipality located in the northeast of Minas Gerais, neighboring Teofilo Otoni. There are not a lot of minerals that come specifically from Ouro Verde, but it is right in the middle of that pegmatite rich area in the Doce Valley. I love the fact the Ouro Verde means green gold in Portuguese.