Aquamarine (Light Green)

Aquamarine
A stone of courage
Its calming energies reduce stress and quiet the mind
Useful for closure on all levels
Helps clear blocked communication and promotes self-expression
Sharpens intuition and opens clairvoyance
Shields the aura and aligns the chakras
Connected to Archangel Raguel
 
These are priced by weight and not necessarily by size.  
 
If you want a more blue piece, please check out the Aquamarinne (Light Blue) AKA Blue Beryl.  Aquamarine is a member of the Beryl family and comes in different colors.  Morganite is also a member of the Beryl family.  Just a FYI.