Fluorescent Nepheline Syenite "Yooperlite", Wisconsin, 492 grams.

Description

Nepheline Syenite rock "Yooperlite" with beautiful long wave fluorescent Sodalite in a very nice pattern. Rounded and smooth from tumbling around in lake Michigan.
Collected in Milwaukee county Wisconsin along the lake Michigan shoreline.
492 grams
4" length
NOTE!
I use a ConvoyS2 LONG WAVE 365nm UV flashlight with a band pass filter installed for finding these and photos, you will need one as well to see the fluorescence as nicely as seen in photos.