The blue color of tourmaline is known by the name indicolite. It is one
of the rarest colors in tourmaline and fine blue and bluish-green
specimens are sought after by collectors.
How much is fine blue
tourmaline worth? The value of natural blue tourmaline can vary greatly
depending on size, quality and color. Buying direct from AJS Gems you'll
get the best value in the market.
Indicolites can range from
light to dark saturated blue. Although color grading is a judgment call,
I think many tourmalines sold as blue are misrepresented. In my
opinion, an indicolite can be any shade or color as long as blue
predominates. For example, most indicolites have some degree of green in
them. (See below). I would call a blue/green stone with dominant blue a
blue tourmaline. If the green dominates, I’d call it a green tourmaline
or verdelite. Generally, blue brings more money, which explains why
some in the trade are eager to call blue/green tourmalines indicolites
even if the green predominates.