Emmonsite is a VERY rare IRON TELLURITE (!) that is known from only a few locales in the world, and then usually only as scattered microcrystals. I have seen only a few specimens ever that have crystals larger than this. This specimen has , also, extremely rich coverage over a large display area, that makes it fairly significant but also pretty - it looks like green sugar was dropped on the matrix.
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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