The Refining Tower
The Refining Tower must be open in order for you to refine a Gemstone into a Jewel of Harmony.
In order to open the Refining Tower, you must first complete the Maya/Nightmare event, if it hasn't already been completed.
Entering:
The entrance is located at Kantur_Remains (Coordinates: 141, 186). You must be wearing the Moonstone Ring*, which can be found from the mobs in Kantur_Remain.
You must also be wearing Wings lvl1 or lvl2 in order to get in; Dinorants work too (As well as Fenrir + Wings lvl3**).
* The Moonstone Ring cannot be traded, but can be dropped. You are also allowed to remove the ring and put another ring on, after you have entered the Tower.
** It doesn't seem to detect lvl3 wings alone, and you must either use a lower lvl pair of wings or ride a Dinorant-- Uniria's don't work because they can't fly.
The Battles:
After entering, the event will start after a minute has passed (to avoid running into trouble, don't move until the small cut scene of Maya's statue rising from beneath finishes).
You must then defeat 50 monsters, and then defeat Maya's Left Hand (15 minute limit). Then wait 2 minutes for the next battle to begin.
You must then defeat another 50 monsters and defeat Maya's Right Hand (15 minute limit). Then wait 2 minutes for the next battle to begin.
You must then defeat another 50 monsters and then defeat both Maya's Left and Right Hands at the same time (15 minute limit). Then wait 2 minutes for the next battle to begin.
You are then moved to a different map, and you must now defeat three groups of monsters, and then Nightmare (20 minute limit).
After finishing this event, you are allowed to enter the Refining Tower, and will remain open for 24 hours*.
* After the 24 hours is up, the event will have to be completed again in order to use the Refining Tower.
Gemstones:
These can be found* anywhere in Kanturu (Kanturu_Ruin, Kanturu_Ruin2, Kantur_Remain).
* The drop rate is a lot lower than that of Souls.
Lower Refining Stones:
To create Lower Refining Stones you must go to Aida and talk to the goblin, Osbourne.
Items that are bought from an NPC may be refined at lvl 4+.
Items not bought from an NPC may be refined at lvl 0+.
Place the general item into the box and press the "Refine" button*.
There is a 20% chance of creating a Lower Refining Stone from general items.
Lower Refining Stones may be used** to increase the degree of a yellow option slightly.
Failing to upgrade a yellow option will cause the yellow option to drop back down to it's base option (the lowest option possible). Just like a Jewel of Life does when you fail to use it on an item.
* The item is consumed in the process.
** Can be used on an item up to 5 times.
Higher Refining Stones:
To create Higher Refining Stones you must go to Aida and talk to the goblin, Osbourne.
Place an excellent item into the box, and press the "Refine" button.
There is a 50% chance of creating* a Higher Refining Stone from excellent items.
Higher Refining Stones may be used** to increase the degree of a yellow option greatly.
Failing to upgrade a yellow option will cause the yellow option to drop back down to it's base option (the lowest option possible). Just like a Jewel of Life does when you fail to use it on an item.
* The item is consumed in the process.
** Can be used on an item up to 5 times.
