This ring has an inlay of glow in the dark material.  This is the type of material that is charged in sunlight or other light and it releases a light green light for hours.  It is safe with no radiation like radium or tritium have. It also glows wildly under black light. Works well on a black ring. The ring can be made in three grades of titanium, black zirconium, cobalt chrome, or stainless steel. The titanium or other metal helps to protect the inlay from damage. Our Executive Series rings are as beautiful as they are unique. Width options in 6mm, 7mm, and 8mm. The inlays are scaled to fit. The ring shown is 8mm wide. Inside ring engraving is available.