You might want a cold shower…walk around the block? view at your own risk
ebay item number-203230462980
I know I’m going to embarrass myself here, but tell me about this piece, so I can fully appreciate it. 
I’m safe. 
To my eye, it seems more like chrysocolla, or something besides natural US turquoise. The massive size and the unusual distribution of bright blue in the stone just suggest a different story.
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Thank you, chicfarmer!