Datolite
Arcadian Mine, Ripley, Franklin Township, Houghton County, Michigan, USA
This datolite specimen has some unusual markings, with the narrow, dendritic veining causing it to almost look like a coral fossil. The color is mostly greys with just a hint of green and it has a rounded face polish rather than a flat surface.
In his 2005 Rocks & Minerals article (v80: 154-179), Tom Rosenmeyer noted, “In 1995, crushing of ...
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