Similar too, and sometimes referred to as Mystic Merlinite, Gabbro is usually mined in Madagascar.
This mineral is rich in magnesium and iron. It’s colours are usually blue/black/grey and mottled.
This crystal is used to help one understand and use their alter ego on the darker masculine side of their energy is a positive way.
When we need drive, determination and speed to achieve something, this is the crystal to ally ones energy with.
Kali energy would be associated with this crystal along with Lillith and Hectate. This is the mineral of the dark goddess.