Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem.

ABOUT TOURMALINE
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.

Fun Facts

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.
Birthstone October, along with opal
Anniversary 8th anniversary
Mineral Tourmaline
Color All colors
Refractive Index  1.624 to 1.644
Birefringence 0.018 to 0.040
Specific Gravity 3.06 (+0.20, -0.06)
Mohs Hardness 7 to 7.5