Ever wondered what those celestones and mirage stones are for? They're used to refine your equipment and improve particular stats. You can exchange your celestones for mirage stones at particular gem merchants. 25 celestone fragments convert to 1 mirage celestone, and the other types of celestones are 3 for 1 mirage celestone.
Refining specific equipment has various effects:
Normal Weapons – Physical Attack Upgrade
Magic Weapons – Magic Attack Upgrade
Physical Attack Rings – Physical Defense Upgrade
Magic Attack Rings – Magic Defense Upgrade
Physical Defense Ornaments – Physical Defense Upgrade
Magic Defense Ornaments – Magic Defense Upgrade
Evasion Improvement Ornaments – Evasion Upgrade
Robes - Maximum HP Increase
Armor - Maximum HP Increase
The higher level of refining you do, the lower the success rate.
25% success rate on gear refined to level 1.
10% success rate on gear refined to level 2.
4% success rate on gear refined to level 3.
1.67% success rate on gear refined to level 4.
0.77% success rate on gear refined to level 5.
0.47% success rate on gear refined to level 6.
0.25% success rate on gear refined to level 7.
0.13% success rate on gear refined to level 8.
0.07% success rate on gear refined to level 9.
0.04% success rate on gear refined to level 10.
0.02% success rate on gear refined to level 11.
Here are some refining tips from Duke Blacke:
Between 0400-0900 (military time)
Less people around you.
Some wait time in between refines.
Refine here for specific #s:
+3 - Avalanche Canyon
+5 - Misfortune City
+6 - Black Mountain
+7 - Ridge of Dreaming Cloud
+8 - Ancient Peak
+10 - Mount Lantern
Visit the following officers to raise your success rate:
+3 visit Officer in Windswept Grasslands
+4 visit Officer in Tradewind
+6 visit Officer in Dragon Wilderness
+7 visit Officer in Dreaming Clouds
Refining success rates can be raised by using Tienkang Stones, Tisha Stones, or Dragon Orbs. Tiankang Stones greatly increase refining rates, although the actual numbers are unknown. Tisha stones grants a lower refining rate than Tiankang Stones, but if the refining fails, the refining level will only go down by 1.
Dragon Orbs give a 100% success rate according to how many stars the Dragon Orb has. Also, for each successive level of refining you do, you'll need each previous level of Dragon Orbs. Such as when refining a weapon from +2 to +3, you'll need a 1 star Dragon Orb, 2 star Dragon Orb, and a 3 star Dragon Orb. This process is very expensive, but it beats a 4% success rate without them.