NIB Nogu obsidian Firefly Glass silver necklace

Obsidian Firefly Glass silver necklace. up to 20" - completely adjustable to the length. base metal is 925 (stamped). never worn since I purchased- need a new home. This is Firefly Glass, It’s designed by NOGU Studio in Toronto. Nope, there are no electronics involved. The necklaces are made of genuine lampwork hand-blown glass and once energized under a light source emit a spectacular glow. They are the grown up luxury version of your favorite glowing baubles as a kid. During the blowing of the glass, small phosphorescent particles are suspended inside the glass and when charged explode with a brilliant emerald glow. To charge: 1) Charge under a bright lamp for up to 5 minutes. The stronger the light source, the brighter the phosphorescent glow! 2) Charge in the sun near a window. Place the bracelet in a bright sunbeam and let the bracelet charge up to 10 minutes. The brighter the natural light beam, the brighter the phosphorescent glow! NOTE: All firefly glass beads are artisanal & handblown. As a result, minor variation in bead shape or size may occur.