This mod doesn't fix this problem completely, only tries to improve the usability somewhat, at least until someone makes new icons for the gems.
The mod simply makes the icons of all gems appear 1.5x bigger.
No default texture was altered, the changes were applied through a new texture, ensuring full compatibility with other mods.
Original / Bigger Gems

Installation
Extract to the %APPDATA%\runic games\torchlight\mods folder.
Uninstallation
Delete the %APPDATA%\runic games\torchlight\mods\BiggerGems folder.
Download
I wasn't yet able to test whether the mod works with the new patch, but there should be no problems. Once someone can verify that it indeed works, I'll upload it to the modding sites.



