Super Seven is a combination of Amethyst, Quartz, Smoky Quartz, Cacoxenite, Rutile, Goethite and Lepidocrocite and embodies all their spiritual qualities. 

The very nature of the stone means that it is not associated with any one chakra; instead, it is fantastic for healing, balancing and energizing all seven chakras. 

Intuitively chosen 

Hardness: 7-7.5
Vibration Number: 4, 5