A set of soul gems, set up to use Multilayer Parallaxing effects. Color coded down the visible light spectrum, with red petty, orange lesser, yellow common, green greater, blue grand, and already violet black. Having fun with MLP!
Not "My Little Pony", you dolt.
This must overwrite any existing soul gem textures, as not only did I recolor things, but I also needed to add a specifically designed alpha channel. It's recommended to uninstall other soul gem retextures entirely, as these are based on the vanilla official HD textures and do not overwrite normal maps (which are shared between multiple gem models) and would have a mismatch.
For an explanation, Multilayer Parallaxing is not the same as Parallax Bump Mapping. It instead makes the appearance of a second "subsurface" beneath the actual geometry surface, without there actually being a second layer. Refractory effects, subsurface scale, and some envirocube reflective effects round out Skyrim's MLP setup. The Frost Atronach (vanilla version, not any that have the *NOT* realistic transparency) and several glacier and frozen lake statics also use it.
In other games, I've seen it used in Dragon Age: Inquisition in the Red Lyrium crystals, and it appears to be a more advanced version with MLP subsurface glow and even an animated UVW.
To see it in action in Jonwd7's Nifskope 2.0, check out this devlog video:
To get your hands on Jon's most current builds of Nifskope 2.0, go here: https://github.com/jonwd7/nifskope/releases