Hackmanite is a mineral that is best known for its unique color-changing properties. Hackmanite typically appears to be pale pink or lilac in color, but when exposed to ultraviolet light, it turns a deep shades of purple or blue.

Hackmanite was first discovered in 1884 by Swedish mineralogist Nils Gustaf Nordenskiöld, and it gets its name from the Finnish town of Hackmann, where it was first found. Hackmanite is relatively rare, but it can be found in deposits around the world, including Siberia, Canada, and Greenland. While Hackmanite is most often used as a gemstone, it also has important industrial applications.

Hackmanite exhibits piezoelectric properties, meaning that it can produce electricity when pressure is applied. As a result, Hackmanite is used in a variety of electronic devices, from watches to microphones. Hackmanite is truly a unique and fascinating mineral.