Animated texture, the crystals flicker/pulse if you hit play. More info on the shader screen. They only get a faint glow, not too bright. To get an actual glow effect you'd still need a glow node in compositing though, they just emit.
I like this one better than my old material kind of like this. This ones better quality.
You can simply use global settings at the top. Tweak the rest to minimize repetition.
4k textures.