Rainbow Fluorite is said to be the stone of clarity and reduces stress. It can improve concentration, self confidence, coordination and lift mental health.
Crystal will be intuitively pick for you.
Broken crystals absolutely can still be used for energy healing and have just as much power as those that have not broken.
A 121mm 107g
B 121mm 130g (Slight Chip to tip of point)
D 133mm 112g (Chipped Point)