Thursday, 23 March 2017

Indicolite - Blue Tourmaline

Tourmaline occurs in virtually every color, but blue is the rarest. The blue tourmaline that has attracted the most attention recently is the rare paraiba variety that was first discovered in Brazil in 1989, and then in Nigeria and Mozambique. These gems, colored by copper, have a neon-like quality that is highly coveted by collectors.
Indicolite tourmaline, colored by iron, can vary from a light to a deep blue. Like most tourmaline, it is strongly pleochroic, meaning it shows different hues when viewed from different directions. Indicolite which is a pure blue is extremely rare, and most examples will have a green secondary hue.
The main sources of indicolite tourmaline are Brazil, Nigeria, Afghanistan, Mozambique and Madagascar.