![Ring Mandrel Light Metal Ring Mandrel Light Metal](https://cdn11.bigcommerce.com/s-3hwibp31n4/images/stencil/300x300/products/2789/688/gau-350.00__83487.1676352775.jpg?c=1)
Ring Mandrel Light Metal
$20.95
BLACKLIGHT/ FLASHLIGHT
*6.25" X 2" X 5/8"
*Blacklight Tube
*LED Light on the end
*Needs 4 "AA" (not incl.)
*Great for Security
As the color of manufactured, or synthetic, gems became more accurate, color alone became more unreliable as a test of authenticity or value. One of the ways to detect synthetics is with ultraviolet radiation commonly called black light. Black light is useful because of phenomenon called fluorescence.