Emerald dust

Emerald dust is a crafting component in that is needed to craft the following items:
It can be found as random loot, guaranteed in a small red-glowing chest inside the nekker monster den east of Ursten, random drop from barghests, tangalores, noonwraiths and wraiths, or purchased from the following merchants:
* All armorers and blacksmiths, except the one at Ardaiso Quarry
* Armors and weapons merchants in Nilfgaardian Army Group 'Center' Camp
* Alchemist in the Crematory near Oxenfurt Gate
* Merchant in the boatyard south of Refugees' Camp
* Merchant at Calveit Watchtower
* Merchant at Coast of Wrecks
* Merchant in the shop in Gildorf
* Merchant in Putrid Grove
* Merchant in the market northwest of Tretogor Gate
* Merchant in Ursten
* Merchant by the road west of White Eagle Fort
* Merchant at the sawmill northeast of Rannvaig
* Merchant at the Isolated Hut on Hindarsfjall
* Merchant in Mohrin Village 
* Merchant in Stacheier 
* Ofieri merchant at Upper Mill 
Emerald dust can also be obtained by dismantling:
ru:Изумрудная пыль
Category:The Witcher 3 crafting components