Tiny pyrite crystals on the face of a barite crystal, with dark purple fluorite associated. The barite is said to be coloured because of pyrite inclusions, but that even under a microscope, crystals can’t be seen. Except in this case you can see them. Width of view 5.75mm. Stack of 85 images.
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![](https://pebblecollection.com/wp-content/uploads/2023/04/2913-Pyrite-Barite-Fluorite-Nakaye-mine-Alamo-mine-Derry-District-Sierra-County-New-Mexico-USA-5.75mm-85-wp-1024x682.jpg)