Why is it so unique?
What makes Zultanite so unique in the gem world are the color-changing properties it possesses. While most gems have fire to them and will flash different colors, Zultanite is one of the few that changes color depending on the light. In sunlight, Zultanite is a kiwi green with flashes of yellow and blue. Indoors, a Zultanite will change to a more olive or even peridot green with flashes of pink and gold. Under candlelight, a Zultanite will take on a deeper pink tone with flashes of brown, olive green and raspberry.
Zultanite gemstone. Photo credit International Colored Gemstone Association.