Pretty rock of the day: Pentagonite

I haven't encountered Pentagonite before, possibly because decent specimens appear to be wildly out of my price range. But on spec I was browsing for micro minerals on ebay and came across this little beauty: ROYAL BLUE PENTAGONITE ON MICRO HEULANDITE MATRIX. Apologies for the shouting but rock dealers tend to wax enthusiastic about their products. I'm not sure if that ebay link will survive forever.

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