Tourmalines have a wide variety of exciting colors with one of the widest color ranges of any gem.
Tourmaline is a birthstone for October, along with opal. Tourmaline is also the gem of the eighth anniversary.
Tourmaline’s colors have many different causes. It’s generally agreed that traces of iron, and possibly titanium, induce green and blue colors. Manganese produces reds and pinks, and possibly yellows. Some pink and yellow tourmalines might owe their hues to color centers caused by radiation, which can be natural or laboratory-induced.
WHY WE LOVE THIS GEMSTONE
Francisco Spinoza’s expedition discovers “Brazilian emerald”:
the first recorded green tourmaline crystal.
Tourmaline becomes electrically charged when heated.
Also when squeezed: it’s piezoelectric too.
Brazilian source famous for vivid blue to
green tourmalines colored by copper.
Tourmaline crystallizes in the trigonal system;
no other common mineral has three-sided prisms.
Watermelon tourmaline is green on the outside
and a delicious pink on the inside.
Liddicoatite tourmaline was named for beloved
former GIA President Richard T. Liddicoat.
Tourmaline’s varieties have a wide range of quality factors considerations.