8mm beads 

Comes with or without charm.

Heart Chakra
White Jade can help one feel calm and peaceful.  It can also help purify the energies of your heart.

Crown, 3rd Eye & Solar Plexus Chakras
Cacoxenite Amethyst aka. Super 7 is a high vibration stone that helps to activate all the chakra's.  It's known as the universal healing stone.