This Terminated Black Tourmaline with Feldspar is a magnificent specimen. It is large, weighing well over 100g. It was sourced from the gem fields of Skardu in Pakistan.
Black Tourmaline is an igneous rock that mostly forms in granite pegmatites. Black Tourmaline is always a solid black and unlike other tourmaline minerals it is never translucent or transparent. It has a distinctive appearance with glossy long striated crystals. This structure and its other properties generate a strong piezoelectric effect, with electrically charged poles at the crystal’s poles. It is also pyroelectric, generating an electric charge through temperature changes. As a result, Black Tourmaline is a highly protective stone, able to block, repel and transmute negative energies.
