noun, masculine/eˈrax/plural: herrajes
charcoal made from the stones of pressed olives
“Don Antonio de Zamora, El hechizado por fuerza, 1st act, 3rd scene (in 1838, Don Eugenio de Ochoa, Coleccion de los mejores autores españoles, volume 14 / Tesoro del teatro español, volume 5, Crapelet’s press, page 330)” — Pin. She already read it, and see that in it they send you four load of herraj for the braziers.
Inherited from Old Spanish, from Andalusian Arabic الرَاهْج (ar-rāhj).