Demon's Souls Wiki
Chunk of Mercurystone

Chunks of Mercurystone are Upgrade Materials in Demon's Souls.

In-Game Description

Melted, poisonous ore. Enhances knives, curved swords, spears, and so on.
An ore that applies a strong poison to the weapon. Weapons can be strengthened by Mercurystones up to a maximum of level 5.