Jewels
Jewel of Ancient Harmony & Jewel of Luck
New stones are available in the Cash Shop and can also be dropped from bosses and events. More information about the drop can be found here
Jewel of Ancient Harmony This stone makes it possible to add Harmony options to Ancient items (also to simple items). The option is selected randomly and immediately gives the maximum parameter, so you are freed from additional sharpening with Refining stones. The chance of the stone triggering is 100%. Detailed information about Harmony options can be found here.
If your item already has the Harmony option, the stone will randomly change it to a new one.
Jewel of Luck Its principle is extremely simple - it makes it possible to add Luck to any thing. The chance of the stone triggering is 50%.