What does almagra mean?
The definition of almagra
Al*ma”gra, n.
Etym: [Sp. almagra, almagre, fr. Ar. al-maghrah red clay or earth.]

A fine, deep red ocher, somewhat purplish, found in Spain. It is the sil atticum of the ancients. Under the name of Indian red it is used for polishing glass and silver.