Glowing Pebble

Origin: South Africa

Approx~ 1.5” x 0.9”

”Natural luminescent stone. Place under light to ‘charge’ the pebble and put in dark space, will glow for hours.
Yttrium, #39 on periodic table.
A natural stone made of particular mineral/minerals without enhancements. It has been tested for radioactivity by the University of Cincinnati Geology Department using the thermoluminescent dosimeter and found not to be radioactive. The luminescence is from an organic structure locked in the stone.”

LC-52-4-2