Onyx
Weapon: Life Leech Chance; armour: Physical Resistance; jewellery: Physical Damage
Effects by tier
A gem gives one effect, chosen by the item it sits in: weapons, armour (every other gear) or jewellery (amulets and rings). Remove = gold to take it out intact (Shatter is free and destroys it).
| Tier | Weapon | Armour | Jewellery | Remove |
|---|---|---|---|---|
| Chipped | Life Leech Chance +1%, Life Leech Amount +1% | Physical Resistance +1% | Physical Damage +1% | 2000 |
| Flawed | Life Leech Chance +3%, Life Leech Amount +2% | Physical Resistance +1% | Physical Damage +2% | 6000 |
| Polished | Life Leech Chance +4%, Life Leech Amount +3% | Physical Resistance +2% | Physical Damage +3% | 20000 |
| Flawless | Life Leech Chance +5%, Life Leech Amount +4% | Physical Resistance +3% | Physical Damage +4% | 60000 |
| Perfect | Life Leech Chance +7%, Life Leech Amount +5% | Physical Resistance +4% | Physical Damage +6% | 200000 |
Caps (all gems together)
Life Leech Chance at most 20%, Life Leech Amount at most 15%.
Physical Resistance at most 10%.
Physical Damage at most 12%.
Combining
Three gems of one type and tier make one of the next tier (Chipped > Flawed > Polished > Flawless > Perfect).
Sources
| Source | How |
|---|---|
| Monster drops | Per kill by monster tier: Normal 0.25%, Magic 1.5%, Rare 5%, Legendary 15%, Boss 30%; the gem type is random, the tier by monster level. |
| Bounty board | Finished contracts: hunt 30%, elite 50%, boss 100% chance of a gem; 2 in the weekly chest. |
| Rift chest | 1 + 0.2 per rift tier. |
| World boss | 2 for every eligible player. |