Piano Ring Glow in the Dark / Music Ring / Sterling Silver 925 / Notes RingA two tone musical staff with notes and a treble clef that glow in the dark for hours. Crafted in 925 sterling silver, this ring is another creation for musicians and music lovers! Available in one or two tone glow in the dark. Measure 8mm width I use the highest quality glow in the dark material. Compared with regular sulfide photoluminescent pigments it have 10 times higher and longer afterglow luminance and afterglow time. I strongly suggest you