This simple mod makes empty/full Soulgems distinguishable after a simple glance.
Lore friendly does not use extra textures or anything else, just removed cubemapping from the empty versions and finely resized to be even more distinguishable.

Here is an animated gif to show differences:

Added, animated version too (scrolling translucent effect), thanks to ravensaw for the idea!

Supported languages: ita, eng, fr, ger, pol, spa
Enjoy

KNOWN BUGS (also in vanilla game):
- Soulgems will keep always the same ID and 3D model. This means that even if you manually charged a soulgem it will still look the same (f.e. empty).
- When you drop manually filled Soulgems they'll loose their charge. If you drop Soulgems you've found already full this won't happen. NOTICE: this bug has been fixed by Unofficial Skyrim Patch: only partially player's filled gems will be emptied when dropped.
- Manually partially filled Soulgems will NOT increase their value (unless you fill them full)

***ABANDONED MOD***
Sorry, lack of interest and impossibility to fix and internal engine bug.