Hackmanite is a rare mineral with very special properties. It is a variety of sodalite that exhibits both tenebrescence and fluorescence. Tenebrescence means that the colour of the mineral changes when held in sunlight. Fluorescence means that the stone itself starts emitting light when shone on with an ultraviolet lamp.
Under a UV lamp, hackmanite will emit a pink to orange glow. After shining on the stone, you will see that the colour has become more intense purple. This is also what happens when you place hackmanite in sunlight. This phenomenon is reversible and after lying in a dark place for a while, the intensity of the colour will have decreased again.
Hackmanite has the ability to change under different circumstances, it is therefore a true transformation stone. It helps to make immediate changes both emotionally and spiritually. Hackmanite also helps solve problems by just making you look at things with a different light.