The first 18 seconds of the video are of the inside then when it turns green that's the outside, looks like olivine crystal maybe, I sent in some samples for testing, looking forward to the results next week. Take care.
Video link -
Anyone have any good fortune around the southern Michigan area? There was a gent on YouTube talking about finding baby nuggets near the Grand Rapids creeks. I'm hoping to make a trek soon before it gets too cold, and do some testing, God willing.