Here is a revision of my party equipment record sheet. Thanks to the suggestion of the fabulous Mr. Reints, I've added a half page for recording party treasure:
The idea is to write treasure found in easy to decipher sections: scroll, potions, weapons and armor. There should probably be other sections.
I'm not that satisfied with it, but hey, I just spent like an hour looking for a damn public domain image of a halfway decent jewel and failed. I may revise this for myself later, but instead of inundating you with a bunch of revisions, in the spirit of fostering DIY, here's a zip file of all the images in the above document as pngs. Use them as thou wilt.