3 tech stones and 100K for composing a Intensified Crystal(80% success) with a Moonlight Box which gives u 100% success rate to upgrade an armor to +1. From here one the Intensified Crystal has a success rate failing which your amour will disappear From here on only Senior Intensified crystal will protect your armor from disappearing although the success rate still counts.
The following stuffs are what you need to make Intensified crsytal
+ 3 technology stones
+ 100k gold
+ Moonlight box ( buy it at grocery merchant at the cost of 2k)(free from npc at uptown)
Just simply right click the moonlight box, there would be a list of combination items on the left in the new pop up screen, find the 5th item and click ok to combine.
After that just right click the Intensified crystal and click on whatever gears part you wanna upgrade.