Crystal systems models

Set of three models of crystalline systems, used for educational purposes in the former soviet union. Mid-20th century. One represents the cubic system and measures 12.5 cm on one side. The tetragonal is 14.5 X 10 X 10 and the monoclinic is 14 X 12 X 10. Together they weigh 700 grams. Ideal as decoration or for educational purposes. In good general condition, with signs of wear. Vintage, años 50, años 60, material educativo, unión soviética, cristales, sistemas cristalinos, geología, minerología, minerals, 50s, 60s, educational material, soviet union, crystals, crystal systems, geology, mining, minerals, 50s, 60s, teaching materials, soviet union, crystals, crystalline systems, geology, mining, minerals.