4oz beautiful super bright, Premium Yooperlite with display box.
Yooperlites are Syenites rich in flourescent Sodalite found in Michigan on the beaches of Lake Superior.
Pics taken using a Convoy S2+UV nichia 365nm with filter (available at www.yooperlites.com) to see the stone fluoresce (Glow).
To see the glow you must use a longwave uv light. 365nm is best.