Hackmanite is a Pink to a grey-white variety of Tenebrescence Sodalite: Na8Al6Si6O24(Cl2, S).
This stone changes colour in sunlight which is why it is tenebrescent (another stone that does this is Tugtupite).
It is helpful for those who suffer from harassment, fear, and apprehension.
It stimulates audacity and strengthens self-esteem while encouraging feelings of happiness, confidence, and contentment.
This stone is called the chameleon stone, and its colour state provides different metaphysical abilities and healing powers.
It is an excellent stone for the throat, third eye, and heart chakra.