This auction is offering 2 very large genuine Blue / Green Turquoise Stone Donuts - These stones are quality Vintage Stock.  They measure 50mm round (2 inches) and 6mm in height.  The hole opening is 12mm.  My pictures are an excellent representation of the stones you will receive.   Nicely polished.    All in excellent, unused condition.  All auctions are 100% or your money back!  Thanks for looking.