Abalone, from New Zeland.
 
The cabochon is approximately 25 mm in diameter, the bail is sterling silver.  
 
The pendant comes boxed with an 18" black satin cord. If you'd like a different length, please let us know; we have 16", 20", 22", & 24" cords available. 
 
The cabochon was made into a pendant in the US by Chris and Theresa of Seaside Stones.
 
Shipped via USPS