Lumogarnets are a unique category of hyperfluorescent, repurposed laboratory garnets, including Ce:LuAG, Ce:GAGG, and Ce:YAG. All these materials function as scintillators, meaning they emit light when exposed to invisible radiation. The intensity of their glow increases with the amount of radiation present, explaining why they illuminate under sunlight, which emits such radiation. Lumogarnets are not only exceptionally bright but also boast a high degree of durability (with a Mohs hardness between 8 and 8.5) and are safe for use.

      Ce:LuAG, or Cerium-doped Lutetium Aluminum Garnet, is a hyperfluorescent green garnet. It is remarkably fluorescent, emitting a vibrant green glow under almost any light, including sunlight and blacklight, and has a Mohs hardness of 8.5.

      Ce:GAGG, or Cerium-doped Gadolinium Aluminum Gallium Garnet, displays a unique hyperfluorescence with a hue that sits between the green of LuAG and the yellow of Cerium YAG. Some specialized GAGG variants, known as High Glow GAGG, possess a manufacturing peculiarity that allows them to photoluminesce, or glow in the dark, for extended periods after exposure to sunlight or blacklight. This garnet fluoresces a bright yellow under black light and has a Mohs hardness of 8.

      Ce:YAG, or Cerium-doped Yttrium Aluminum Garnet, is a hyperfluorescent yellow garnet known for its intense yellow fluorescence. Like its lumogarnet counterparts, it fluoresces under sunlight and most other lighting conditions, and it has a Mohs hardness of 8.5.