Zultanite is a 100% natural gemstone with no enhancements. It is ethically mined with environmentally sound methods and fair wages for miners. Zultanite is extremely rare; few have had the pleasure to behold its incredible beauty. Only one mine produces genuine Zultanite, in the remote mountains of Turkey. This gorgeous stone has natural color change properties, showing green in sunlight and fluorescent light, and displaying pink and/or yellow flashes in soft incandescent light and candlelight. The color change effects are most apparent in stones over 3 carats, but can be seen to some degree in smaller stones as well.
Because Zultanite measures a 6.5-7.0 on the Mohs hardness scale, it is important to be aware that it can abrade or chip with very hard daily wear. It is not as hard as diamond, moissanite, sapphire, and the like - more comparable in hardness to peridot, amethyst, and garnet (not quite as soft as opal though). If you plan to wear Zultanite on an everyday basis (such as for a wedding/engagement ring), and especially if you tend to be hard on your jewelry, I recommend looking into having it scheduled separately on your insurance policy to provide for stone replacement in case of damage.