Red Bijou

Red Bijou is an ingredient in making the following lower headgear at Justin: 100 pieces are required for each. A run at the Endless Tower can give 10 pieces.
 * Staff of Inferno
 * Axe of Inferno
 * Blade of Inferno

It is recommended to hunt the red Ferus in abyss_02 as it also drops Flame Heart which is needed for those inferno headgear.