Following the success of the 5-oz Grand Canyon coin launched in August, 7k Metals has gone even bigger with the 1-kilo version, which is nearly seven times heavier than its predecessor. This ...

TASS/. Metal workers from a Russian weapons foundry, known as Art-Grani located in the Urals city of Zlatoust have minted a silver coin weighing one kilogram containing the profile of US President ...