Heart of Stone is a unique Consumable(Potion) that can be consumed for a positive effect.
Fragments of malachite swirl at the bottom of this potion, coalescing and separating rhythmically.
Properties
Potions
Single Use
Rarity: Common
Weight: 0.1 kg / 0.2 lb
Price: 1 gp 
UID
CONS_Hag_Heart_Of_Stone
Effect
Bonus action
Consume the potion to inflict 
on yourself.
Condition: Heart of Stone
Duration: Until 
Where to find
At the end of the Overgrown Tunnel in the Acrid Workshop. Set on a stone shelf alongside ten other dangerous potions made by Auntie Ethel.
Notes and Trivia
- One of three unique potions in the Acrid Workshop which has any beneficial properties.
- It is a possible reference to the Witcher 3: Heart of Stone expansion.