This chunky dark grey blue kyanite from Zimbabwe displays some biotite mica.
Kyanite is an aluminosilicate mineral with a triclinic crystal system and a hardness of 5-7. 
Kyanite has a high vibration and acts as a bridge between the physical and spiritual. It opens communication channels with others enabling troubled relationships to be resolved. Kyanite cuts through energy blockages realigning and balancing the chakras and auric field. Quartz amplifies those energies making this a powerful stone for change and transformation
120gm
8.5 x 4 x 2.4cm