Glass bead doped with 5% Manganese 2+ Ions – NEW! red fluorecence!
Size about 13mm – weight ~ 1.2 – 1.4 grams
Nice optical glass bead. Each one handmade in our lab.
White at normal light
Red (strong peak @ 635 nm) under UV excitation
Please do not use common UV LEDs, they produce wavelengths above 390 nm and are not suitable! Blacklight tubes work best! The UV lamp used for the photos has a wavelength of 365nm
Under daylight they are water clear and colorless