Tainted Jewel

Vendor

Base value 45s (carries a vendor price; bought or sold as a reagent).

Crafting

Not craftable.

Gathering

Not a gathered material.

Dropped by

Abyssal Behemoth	level 52
Abyssal Shard Slime	level 52
Cursed Name Warrior	level 52
Earthquake Basilaur	level 52
Name-Cursed Warrior	level 52
Name-Cursed Blademage	level 52
Name-Cursed Blademage	level 52
Name-Cursed Wizard	level 52
Name-Cursed Wizard	level 52
Water Moss Slime	level 52
Giant Ruby Moss Slime	level 52
Cunning Field Root	level 52
Sunbathing Field Root	level 52
Wave Elemental	level 52
Tsunami Elemental	level 52

and 5 more.

Note: the monster level tells you the zone tier where it is found; exact spawn coordinates are not published in the game data. See the World Atlas for zone level bands and Dungeons & Raids for instanced drops.