The crystal bag is a small bag to take up crystals. These crystals help to raise your resistances.
You can't "make" charms - you find/buy them and put them into your items with a charm quality. And these charms have various effects on your stats or durability of your equipment.
Kiya
Crystals and their resistance values:small 2
medium 4
large 6
larger 8
extra large 12
for the resistances in: Air, Bone, Earth, Fire, Poison, Shadow, Water, Spiritual - depending on which crystal you have put into the bag. You can take up a maximum of 5 - either 5 different, or even several of the same resistance.
Charm value list, made by Raze, click here pleasehttp://www.kiya1.de/beyond/actgeneral/charm1.pngand here a pic link, how to put charms into your equipment. No skill required for either procedure => charms or crystals.