Im tempted to pick up tinkering and start to create magic jewelrys.
Any one whit experience of it can please tell how big are the chanse to realy get some good. remember i playe on SP so its not only the uber ones who counts ( i hope)
The chances are VERY low to get something good.
Remember that if the jewelry has a special mod - say MR2 on Saphire pieces - you only get that mod like 10-20% of the time. So you would need to use 50-100 of the Gems just to get ONE and it might have terrible mods to go with it.
Also remember that when you fail you can also lose gems so it will take more than that.
I'd suggest going to Test Center, say 'give resources' and then set tinkering to 100 and test it out.
From the 200 you get in your bank box - I'll bet you only make 2-4 with the mod and those will likely be junk.
My recommendation is for the magic jewelry either to get a higher chance of the special mod (like 80%) or cost only 2 gems to make the items - not 10.
As it is - its a waste of time.