Medusa Scales

Medusa Scales are obtained by using a dagger or bladed weapon to harvest from Medusa while she is dead OR alive. There are 2 different hues of Medusa Scales, Invulnerability Blue while she's alive, and a darker blue from her corpse. The brighter scales are much more desirable as they yield 100% effective lenses, whereas the darker lenses are only 90% effective.

Bright blue scales harvested while alive