Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Lord Valthalak's Amulet

Quest	Level	Side
The Right Piece of Lord Valthalak's Amulet	60	Both
The Right Piece of Lord Valthalak's Amulet	60	Both
The Right Piece of Lord Valthalak's Amulet	60	Both
The Right Piece of Lord Valthalak's Amulet	60	Both
Mea Culpa, Lord Valthalak	60	Both

Source	How	Reagents
Left Piece of Lord Valthalak's Amulet	Use item	Top Piece of Lord Valthalak's AmuletRight Piece of Lord Valthalak's Amulet
Right Piece of Lord Valthalak's Amulet	Use item	Top Piece of Lord Valthalak's AmuletLeft Piece of Lord Valthalak's Amulet
Top Piece of Lord Valthalak's Amulet	Use item	Left Piece of Lord Valthalak's AmuletRight Piece of Lord Valthalak's Amulet