Indicolite which is a pure blue is extremely rare, and most specimens will have some green secondary hue. A teal or blue-green color is quite common in indicolite. The purer blues will tend to be found only in small sizes, often under 1 carat. Larger stones will tend to have a stronger green component. Blue-green , and rarer still bi colour The main sources are Brazil, Nigeria, Afghanistan, the USA (California and Maine), Namibia and Madagascar.
this gorgeous indigo blue afghan
indicolite tourmaline is masterfully step cut for a total weight of 2.10 ct ready to set this a rare loupe clean example