Description

Optical glass bead doped with 5 mol% Holmium oxide – NEW!
diameter ~ 12 mm – 1.5 grams
Material BaP:Ho Glass
Nice glass bead. Each one hand crafted in our lab.

Depending on the sort of light you get different colors of the bead

Yellowish at daylight or bulb
raspberry red at fluorescent light (all kind of tubes LCD screen, Neon tubes)