This is a natural Royston turquoise cabochon.  The stone is stabilized and No backed.  

Mohs scale (gemstone hardness scale) of natural turquoise is 5~6 so it is not a harder stone like crystal.  Therefore turquoise especially which has spider-web matrix usually stabilized and backed to protect the stone. 

Specialized in natural turquoise and cut the stones well balanced clean shape which is perfect for bezel setting.

7% discount for each items is applied if you buy more than one item at a time.  Please also request combine shipment to save your shipping cost.