As with many MSH specimens, you don’t always know what you’ve got! White to tan calcioburbankite on hexagonal prismatic petersenite-(Ce). Many of the brown crystals, the lighter ones, are siderite, but some, the darker brown ones, fluoresce orange, maybe hilairite? There are tiny thin plates of an unidentified mineral that fluoresce green. Ex Noel and Ann Kennon Collection. Ex Jean Pierre Beckerich. Width of view 5.75mm. Stack of 111 images.
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