This is a Yooperlite sure it looks like a simple stone at first look.
But under the 395nm light it will be a light orange to pinkish color and under a 365nm it will glow itense orange red.
 
You can see the other yooperlite in store to see the color when under a 365nm light  this one was shot under a 395nm light
 
261g
57mm x 57mm x 57mm