I have a small question... lets say if i try to overenchant a B grade jewel such as balck ore ring / earring etc .. i know that until +3 m.def will be incresead +1 per enchant....but how much the m.def will be increased at +4 ... or at +5 ...and also does it matter if its a ring or an earring or a necklace when i inchant it past +3. i've heard that they enchant diferently... like earrings get more m.def then rings... can u guyz tell me the way it really is ... THX !

+2mdef over +3

it doesent matter if its ring / eraring or necklace ..?

always double effect at +4
e.g.
bow:
enchant bonus from +1 till +3 is 10 afaik
then +4, +5, +6 and so on is always 20

bow p atk is 1000
+1 1010
+2 1020
+3 1030
+4 1050
+5 1070
+6 1090
...

it is fixed, doesnt matter on armor, helmet, boots, earrings, neckleases, etc...
so if ur BO necklase has
clean 72 m.def
+1 =73 m.def
+2 =74 m.def
+3 =75 m.def
+4 =77 m.def
+5 =79 m.def and so on until u get "You have earned x cystals B Grade"