Black Gypsum Specimens.
Origin: Alcanadre, La Rioja (Spain)
Size: Approx. 4-5 cm.
SET OF 35 UNITS
The black gypsum from Alcanadre is a historical construction material quarried in La Rioja, composed of gypsum mixed with dark clays that give it its grayish tone. It was traditionally used for the first base coats on walls, reserving white gypsum exclusively for the final finish.
