Rift Item:Antique Turquoise Chain  

This may be upgraded to Qaijiri Pendant of Precision or Qaijiri Pendant of Aversion using the Qaijiri Ritual Stone (from Hounded).

You can then use Voshan's Phylactery (from The Scrying Game) to upgrade the necklace to it's final, Purple form: Spirit-Infused Pendant of Precision or Spirit-Infused Pendant of Aversion.