Medical ID Jewelry

So...

PyramidCollections.com has this "magickal weight loss" amulet.
It contains a combination of stones that have desireable properties for weight loss.
Rather than spend 30 dollars on something like this, but still liking the idea, I was thinking about getting some chipped stone pieces, but wondering which ones (and if anyone wanted to make a craft day out of it and do it with me)
Here's the list I've compiled so far of ones that look interesting.

Sodalite- regulates metabolism
Amethyst- fights addiction
Obsidian- curbs cravings
Amazonite- self-determination, balance, calming/lifting of spirits
Selenite- Energy
Hematite- Absorb/dispel negative energy
Light Agate- Success
Fluorite- aids in good decision making
Labradorite- inner strength

So... anyone interested? Any advice?
Anyone else realizing that I'm mostly posting this to give this board some activity?
Still, I enjoy making my own jewelry and think that there's something to this :)