1034 Erionite-K, Heulandite, Malpais Hill, Dudleyville, Pinal Co., Arizona, USA July 25, 2021 Steve Arizona North and Central Americas United States Colourless blocky coffin-shaped heulandite crystals with colourless prisms of erionite-K. Width of view 3.5mm. Stack of 55 images. Click on the image below for a higher resolution version.
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