Stilbite is a Heart and Crown Chakra stone.  It helps to organize our energy, thoughts and to filter out distractions giving us power to avoid overwhelm.  It helps us to discern and prioritize our energy and actions.  
Heulandite is also a Heart and Crown Chakra stone.  It helps to integrate the Heart and Mind energies.  Heulandite assists the Heart to focus on positive emotional energies and radiates those energies through our aura strengthening our energetic body.  
The combination of clarity of thought and positive emotional support is a powerful stone to pair with Lepidolite for treating anxiety.  This piece weights 8.25oz and measures  59.5mm.