Mu Online Jewels — What Every Jewel Does
Jewels are how Mu Online gear gets stronger and, on most servers, what players pay each other with. Below is what every jewel does, the success rate the server really rolls, the NPC price, and the custom jewels private servers add — all read from the default Season 21 server files.
The main jewels
Raises an item from +0–+5 to the next level, 100%. Also the ingredient for +10–+15 and the common trade currency. NPC price 3,000,000 Zen.
Raises +6 to +9. Success 50%, or 75% on an item with Luck. NPC price 6,000,000 Zen.
Adds +4 to the item's additional option, up to +28. Success 50%. NPC price 16,000,000 Zen.
Powers almost every Chaos Machine recipe — see the Chaos Machine guide. NPC price 800,000 Zen.
Used for stat fruits, 3rd–5th wings, socket and Harmony-era recipes. NPC price 15,000,000 Zen.
Castle Siege and 380-item material; also feeds the Harmony and socket systems. NPC price 15,000,000 Zen.
Adds one Harmony option to a non-set item. Strengthening succeeds 60%; see below.
Using jewels step by step
| Item level | Jewel | Success (default) | Notes |
|---|---|---|---|
| +0 → +6 | Bless | 100% | Drag the jewel onto the item |
| +6 → +9 | Soul | 50% / 75% with Luck | A failure costs the jewel and can drop the item level |
| +9 → +15 | Chaos Machine | see the +15 table | (N−9) Bless + Soul + 1 Chaos |
| Option +4 → +28 | Life | 50% | On failure the option can drop |
Dragging Bless and Soul onto items is allowed on the default files (on); a few servers switch it off so that levels only come from the Chaos Machine.
Jewel of Harmony
Harmony is its own small system in the Kanturu Refinery Tower. Elpis refines Gemstones into Jewels of Harmony (80%) and turns unwanted items into Refining Stones — Lower from normal items (20%), Higher from excellent ones (50%). Drag a Jewel of Harmony onto a non-set item to give it one Harmony option (60%); Refining Stones then raise the option's value (20% with a Lower stone, 80% with a Higher one). Jerridon removes the option again. An item with a Harmony option cannot be sold in a personal store.
The option is rolled from the item's type. The maximum values in the default files:
| Item type | Option | Max value |
|---|---|---|
| Physical | Strength Stat Increase | +30 |
| Physical | Agility Stat Increase | +30 |
| Physical | Energy Stat Increase | +30 |
| Physical | Attack Success Rate Increase | +500 |
| Physical | Attack Power Increase | +40 |
| Physical | Critical Damage Increase | +40 |
| Physical | Excellent Damage Increase | +40 |
| Physical | Skill Attack Power Increase | +35 |
| Physical | Item Durability Increase | +30 |
| Physical | SD Reduction Rate Increase | +10% |
| Physical | 5% of Mana Converted to Attack | +45 |
| Magical | Strength Stat Increase | +30 |
| Magical | Agility Stat Increase | +30 |
| Magical | Energy Stat Increase | +30 |
| Magical | Attack Success Rate Increase | +500 |
| Magical | Wizardry Attack Power Increase | +80 |
| Magical | Critical Damage Increase | +40 |
| Magical | Excellent Damage Increase | +40 |
| Magical | Skill Attack Power Increase | +35 |
| Magical | Item Durability Increase | +30 |
| Magical | SD Reduction Rate Increase | +10% |
| Magical | 5% of Mana Converted to Magic Attack Power | +85 |
| Defensive | Vitality Stat Increase | +10 |
| Defensive | Defense Increase | +50 |
| Defensive | Maximum AG Increase | +100 |
| Defensive | Maximum HP Increase | +100 |
| Defensive | Maximum MP Increase | +100 |
| Defensive | Automatic Life Recovery Increase | +10 |
| Defensive | Automatic Mana Increase | +10 |
| Defensive | Damage Reduction Increase | +50 |
| Defensive | Item Durability Increase | +30 |
| Defensive | SD Ratio Increase | +5% |
| Defensive | Convert 10% of Mana to Life | +120 |
| Books | Attack Success Rate Increase | +500 |
| Books | Curse Damage Increase | +40 |
| Books | Critical Damage Increase | +40 |
| Books | Excellent Damage Increase | +40 |
| Books | Skill Attack Power Increase | +35 |
| Books | Item Durability Increase | +30 |
| Books | SD Reduction Rate Increase | +10% |
| Books | Convert 5% of Mana to Curse Damage | +45 |
Custom jewels on private servers
Many private servers add extra jewels that the official game does not have. The default Season 21 files ship them switched on, with these effects:
Takes an item at +5 or lower straight to +6, 100%.
Takes an item at +8 or lower straight to +9, 100%.
Sets the additional option to +28 at once, 100%.
Adds random excellent options: 4 on regular and mastery gear, 3 on legendary.
Adds the Luck option, 100%.
Adds the weapon Skill option, 100%.
Makes the item +15 at once, 100%.
Makes the item full-option excellent, 100%.
Adds one extra socket to a socket item, 100%.
By default these do not work on bound items or on the event wings (Conqueror, Angel and Devil). Some clients label them Jewel of EXC, Jewel of Level and Jewel of FO — they are the same jewels.
FAQ
What does the Jewel of Soul do in Mu Online?
It raises an item from +6 to +9, one level at a time. In the default server files it works 50% of the time, or 75% on an item with Luck.
What is the Jewel of Life success rate?
50% per jewel in the default files. Each success adds +4 to the additional option, up to +28.
How do I get a Jewel of Harmony?
Take a Gemstone to Elpis in the Kanturu Refinery Tower; refining succeeds 80% of the time.
Which jewel makes an item +15 instantly?
None in the official game. Some private servers add a custom Jewel of Level (Kundun) that does it at 100%.
How much is a Jewel of Bless worth?
The NPC price in the default files is 3,000,000 Zen, but on most servers Bless is the everyday trade currency and its player price is set by the market.
- Bless: +0 to +6, 100%
- Soul: +6 to +9, 50% (75% with Luck)
- Life: +4 option per jewel up to +28, 50%
- +10 to +15: Chaos Machine
- Harmony: one option per item, 60%
Chaos Machine · Jewels · Wings list · Commands · Item database