That unmistakably eerie green glow is coming from a 15mm Uranium
Glass bead, fluorescing under Ultra Violet light coming from a
miniature UV LED torch. Both items are supplied in a custom ‘test
tube’ holder, which has its own flourescent label!!
Uranium Glass, (also known as Vaseline and Depression glass) has
been made for more than 2000 years and contains trace amounts of
Uranium Oxide. It is very mildly radioactive but this is only
detectable on the most sensitive instruments, where it registers very
slightly above normal background levels and is not considered
hazardous. The sleek metal Mini keyring UV torch, measures just 10mm
x 45mm and is powered by 4 LR41 button cells (supplied).
It can also be used to check ‘invisible’ security marks on
banknotes and credit cards and, of course, verifying antique Uranium
and Vaseline glass objects.