List of modifiers for emerald jewel

Prefixes

(15-25)% increased parry damage

(6-16)% increased damage with bows

Companions have (10-20)% increased maximum life

(10-20)% increased hazard damage

(6-16)% increased damage with crossbows

Herald skills deal (15-25)% increased damage

(4-8)% increased projectile speed

(10-20)% increased damage while you have an active charm

Damage penetrates (5-10)% lightning resistance

(5-15)% increased magnitude of poison you inflict

(6-16)% increased damage with quarterstaves

Suffixes

(2-4)% increased Attack Speed

(2-4)% increased Attack Speed with Spears