▲ 20 r/whatsthisrock
Great Lakes Sodalite and...?
Went up to Door County, Wisconsin this week (specifically Ephraim, WI). On the left are Yooperstones that I purchased (trust me, I wanted to find them organically but was having no luck), and on the right are some mystery stones that we found in a random gravel pit near the motel. As far as I can tell, one is a favosite fossil based on the honeycomb pattern, and the other just seems like a random piece of gravel. What would cause both rocks on the right to glow such vibrant yellow? I did wash them when we got home to rule out foreign material like paint (combination of soap, diluted vinegar, and hot water).
Thanks for your help!
ETA: UV light is a 395nm
u/MagicalAgitator — 2 days ago