Banded Madagascan Agate Pendant.      
Agate is the name given to numerous varieties of banded Chalcedony, a mineral of the Quartz group.  The name Agate comes from the river Achetes in Sicily, where agates were found in ancient times.  
Key words:  Communication, clarity, confidence.   
Element:  Earth, Water.     
Chakras:  Throat (5th).