Kunzite (like hiddenite) is a variant of the mineral Spodumen.
Kunzit was discovered in 1902, and was named after Tiffany & Co's main jeweler, George Frederick Kunz.
It most often occurs in shades of light pink, but more vivid colors are possible and can reach rare shades of vivid purple to violet. It is colored in this way due to the content of small manganese particles. When exposed to intense light, the color may fade over time, so it is better to protect both jewelry and crystals from light and store it in a case or box.
The hardness of the kunzite is 6.5 - 7 on the Mohs scale.