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I could definitely help explain a lot, but even I am still learning. One thing I am really loving about minerals right now are 2 generations of growth. Over in your neck of the woods there is iridescent calcite from Oskaloosa, Iowa. Really beautiful material, first a dark calcite grew and was coated with dolomite to give it iridescence, then a secondary growth of calcite came in and grew long, white crystals on top of it all to give a wonderful contrast. Here...

Nature is awesome.

Well, who knew? I've spent time around Oskaloosa, Pella and Lake Red Rock. That is beautiful.

Thanks for all the Points for the Shadow Contest! 🌞