Another important mineral extracted in Hispania was lapis specularis, a type of translucent gypsum, much appreciated as a mineral for the making, as crystal, windows in Rome.
Outro importante mineral extraído en Hispania era o lapis specularis, un tipo de pedra de xeso especular traslúcido moi apreciado como mineral para a fabricación, a modo de cristal, de xanelas en Roma.