The color change of zultanite is caused by the presence of traces of chromium and vanadium. These metals absorb certain wavelengths of light, which results in the different colors that zultanite can display.
Zultanite is a relatively new gemstone, and it is only recently that it has become popular in jewelry. It is considered to be a valuable gemstone, and it is often used in high-end jewelry.
Here are some additional facts about zultanite:
* It is the birthstone for the month of January.
* It is also known as "Ceylonite" or "Ottomanite."
* The largest known zultanite crystal weighs over 120 carats.
* Zultanite is a very hard gemstone, and it is resistant to scratching and wear.
* It is also a very rare gemstone, and it is estimated that only a few thousand carats of zultanite are mined each year.