O-3 Orbital Silver Necklace

925 sterling silver necklace. Pendant with centerpiece 20 mm diameter and two sides of 11 mm, with 0.85 mm thickness. Round link chain 42 cm long and 0.95 mm thick with carabiner closure. Total weight 4.1 g. The pendant schematically represents the figure of a central atom symbolizing our present being. It is accompanied by two representations of the atom made of aged silver, symbolizing our past and our future.