This selection includes 11 different types of stones and minerals: 250 g river pebbles, 250 g black small polished stones, 250 g Tiger's Eye small polished stones, 250 g white small polished stones, 250 g assorted small polished stones, 60 g small gemstones, 250 g amethyst points, 250 g iron pyrite and 1 large agate slice. Add some stone and mineral naturals to sand and water play or sensory stations. For ages 3 and older.