Amethyst
Weapon: Critical Chance; armour: Death Resistance; jewellery: Death 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 | Critical Chance +1%, Critical Hit +5% | Death Resistance +2% | Death Damage +2% | 2000 |
| Flawed | Critical Chance +1%, Critical Hit +10% | Death Resistance +3% | Death Damage +4% | 6000 |
| Polished | Critical Chance +2%, Critical Hit +15% | Death Resistance +4% | Death Damage +6% | 20000 |
| Flawless | Critical Chance +3%, Critical Hit +20% | Death Resistance +6% | Death Damage +9% | 60000 |
| Perfect | Critical Chance +3%, Critical Hit +25% | Death Resistance +8% | Death Damage +12% | 200000 |
Caps (all gems together)
Critical Chance at most 10%, Critical Hit at most 75%.
Death Resistance at most 30%.
Death Damage at most 40%.
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. |