Worn as talisman for thousands of years, turquoise is the stone of protection from harm.  It is also a stone of friendship and is said to bring peace to your home.  Turquoise harmonizes with the wearer and legend has it, if it goes pale, it's warning against danger or infidelity.  It is said to calm nerves associated with public speaking and is great for exhaustion, negative thinking and panic.  It's aligned with the immune system, eyes and joints.