# Purity of Black Crystal

**Knowledge ID**: 6542

## Description

Black Stones (a pure Black Crystal) are an extremely popular ingredient in Alchemy.
The purer a Black Crystal is, the stronger its resonance, and the more common unexplainable phenomena occur. Alchemists have been studying Black Crystals from the birth of Alchemy for this very reason.

## Quest Rewards

Errands that award this knowledge entry:
- **Reward** — [The Whereabouts of the Gunpowder](/legacy-quest/152276.md) from Di Lanoa
- **Reward** — [[Awakening] Artifacts of the Naga](/legacy-quest/217615.md) from Secret Guards