Diamond
Weapon: Holy Damage; armour: Elemental Resistances; jewellery: Holy Resistance
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 | Holy Damage +2% | Elemental Resistances +1% | Holy Resistance +2% | 2000 |
| Flawed | Holy Damage +4% | Elemental Resistances +1% | Holy Resistance +3% | 6000 |
| Polished | Holy Damage +6% | Elemental Resistances +2% | Holy Resistance +4% | 20000 |
| Flawless | Holy Damage +9% | Elemental Resistances +3% | Holy Resistance +6% | 60000 |
| Perfect | Holy Damage +12% | Elemental Resistances +4% | Holy Resistance +8% | 200000 |
Caps (all gems together)
Holy Damage at most 40%.
Elemental Resistances: spread over each elemental resistance, under their caps.
Holy Resistance at most 30%.
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. |