Stones and jewels
Black, White and Red stones imbue equipment. Each colour has four tiers: Stone, Crystal, Jewel and Best Jewel.
- Black improves an item's basic power.
- White adds skill to an item.
- Red lowers an item's level requirement.
Tiers and drops
Any monster can drop a stone: 0.25% per kill plus 0.0175% per monster level, at most 3%; bosses 25%. The colour and tier are then picked by weight, and a tier only drops from monsters at or above its level (bosses can drop any tier).
- Level 1: 0.2675% per kill
- Level 25: 0.6875% per kill
- Level 50: 1.125% per kill
- Level 100: 2% per kill
- Level 150: 2.875% per kill
| Colour | Stone | Tier | Imbue rate | Imbue increase | Monster level | Weight | Shops |
|---|---|---|---|---|---|---|---|
| Black |  Black Stone | Stone | 1 | 1 | 0 | 100 | - |
| Black |  Black Crystal | Crystal | 5 | 2 | 20 | 20 | - |
| Black |  Black Jewel | Jewel | 15 | 10 | 50 | 4 | - |
| Black |  Best Black Jewel | Best Jewel | 25 | 15 | 90 | 1 | - |
| White |  White Stone | Stone | 1 | 1 | 0 | 100 | - |
| White |  White Crystal | Crystal | 5 | 2 | 20 | 20 | - |
| White |  White Jewel | Jewel | 15 | 10 | 50 | 4 | - |
| White |  Best White Jewel | Best Jewel | 25 | 15 | 90 | 1 | - |
| Red |  Red Stone | Stone | 1 | 1 | 0 | 100 | - |
| Red |  Red Crystal | Crystal | 5 | 1 | 20 | 20 | - |
| Red |  Red Jewel | Jewel | 15 | 2 | 50 | 4 | - |
| Red |  Best Red Jewel | Best Jewel | 25 | 3 | 90 | 1 | - |
Compound (JinHyun)
At JinHyun (Prairie): combine lower tiers into higher ones for a Jeon fee. A valid compound always succeeds.
| Makes | From | Fee |
|---|---|---|
| Black Jewel | 5 x Black Crystal | 500,000 Jeon |
| White Jewel | 5 x White Crystal | 150,000 Jeon |
| Red Jewel | 5 x Red Crystal | 75,000 Jeon |
| Black Crystal | 3 x Black Stone | 10,000 Jeon |
| White Crystal | 3 x White Stone | 3,000 Jeon |
| Red Crystal | 3 x Red Stone | 3,000 Jeon |
 Steel | 10 x  Iron | 42,000 Jeon |
 Copper Steel | 10 x  Copper | 42,000 Jeon |
 Zinc Steel | 10 x  Zinc | 42,000 Jeon |
 Tin Steel | 10 x  Tin | 42,000 Jeon |
Combine (Alchemist)
At Alchemist (Prairie), Tamrang (Prairie): turn one stone of any tier into a variant with a random bonus (for Black and Dragon stones a better imbue success chance or a stat bonus; White and Red stones get other random bonuses). Success chance 50%; on a failure the stone is used up. No fee.
Refine (Alchemist)
Element crystals give a five-element attribute to equipment with a Force socket. The fee is the item's price x 0.4 for each crystal. An Imperial Secret Jewel costs 2,000,000 Jeon to apply.