I have found a few unique jewels. So far, one of each in my level 1-115 play through.
Farsight Globe
Farsight Globe
Jewel
Required Level: 40
Item Level: 80
Can be Inserted into Socketed Items
-(2 to 3)% to Enemy Fire Resistance
-(2 to 3)% to Enemy Lightning Resistance
-(2 to 3)% to Enemy Cold Resistance
-(2 to 3)% to Enemy Poison Resistance
Zakarum Stoning Rock
Zakarum Stoning Rock
Jewel
Required Level: 60
Item Level: 60
Can be Inserted into Socketed Items
1% Chance to cast level 4 Shockwave on Kill
+6% Damage to Demons
Weapon Physical Damage +6%
Eye of the Storm
Eye of the Storm
Mystic Orb
Right-Click to Apply
1% Chance to cast level 50 Supernova on Melee Attack
+5% to Lightning Spell Damage
+12 to Energy
+10 Required Level