Black Tourmaline Cluster from Erongo Mountain, Erongo Region, Namibia

This is a top-shelf large Piece of Black Tourmaline from Erongo Mountain, Erongo Region, Namibia.

Dimensions:
8.2 cm x 15.1 cm x 10.1 cm 
3.22" x 5.9" x 3.9"

Weight:
890 g