What he said above.
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					Originally Posted by brett 75  Curt how can you tell it's a refractor ? Is there an easy tell tale sign ? Thanks for the insight , Brett | 
	
 I learned some time back that some people can't see refractors.  An older lady that owned a show I used to frequent couldn't see the difference when they were side by side.  It was definitely an issue either with her eyes or how her eyes/brain process the sights she was seeing.
In my case, I can see them quite easily and to make it easier, this one was graded and marked as such.  They will practically jump out from a stack of non refractors when the light hits them just right.