The Rubián Magnesite mines are a classic of Galician mineralogy. Currently these mines are active exploiting one of the largest deposits of magnesite in Spain. This specimen, which dates from the late 1970s, shows us a rich aggregate of lenticular crystals of this magnesium carbonate, brilliant, translucent, and with a very aesthetic orange color. It belongs from the Joan Astor collection, with his handwritten and another typed labels.