Lumogarnets are a class of hyperfluorescent repurposed lab garnets introduced into the jewelery trade by Stephen and Timothy Challener of Angry Turtle Jewelry in 2022. The three we offer at House of Sylas are cerium doped LuAG, high glow cerium doped GAGG, and cerium doped YAG. All three lab garnets are types of scintillators. Scintillators glow in the presence of invisible radiation, and the brighter they glow, the more radiation present. Lumogarnets are durable (mohs 8-8.5), safe, and the brightest gems you will find anywhere.
Cerium doped GAGG (Gadolinium Aluminum Gallium Garnet) is a hyperfluorescent garnet with a color between green LuAG and yellow Cerium YAG. Some special varieties of GAGG (High Glow GAGG) have a special manufacturing defect, they will photoluminesce for extended periods of time (GLOW IN THE DARK) after being exposed to radiation from the sun or blacklight. GAGG will fluoresce a bright yellow color under black light. It has a mohs hardenss of 8.