11.16 ct Bi-color Tourmaline - Oval

At 11.16 carats, this tourmaline from Nigeria carries its bi-color face through an oval cut, measuring 15.3 x 11.8 x 10 mm.

Tourmaline takes a wider range of color than almost any other gem species, because its crystal will accept so many different coloring elements. Nigeria's gem fields rose to prominence in the 1990s and remain a significant modern source. It is wholly untreated, its color finished by geology rather than by any furnace or enhancement.

A single natural gemstone with no duplicate behind it; once it is set or collected, there is no other. It will outlast everyone who owns it, which is most of what an heirloom really is. Hand-selected and filmed by Caveman Gems in good light, shown as honestly as a screen allows.