Sapphire from India

Sapphire
The 'wisdom stone'
Focuses and calms the mind
Releases unwanted thoughts and mental tension
Brings peace of mind and serenity
Restores balance within the body
Releases depression and spiritual confusion
Stimulates concentration
Brings prosperity and attracts gifts of all kinds
Placed on the throat, releases frustration and facilitates self-expression
From India
 
These are priced by weight and not necessarily by size.  These are the ones I take to shows.