People have always considered gold as being one of the most captivating and stimulating metal. Even from ancient times until our days it has fulfilled various and important roles and it also has had a great significance in the life of humans. Gold was first used as ornaments for kings and now it became a valuable component in modern medicine. It presents special characteristics which make referral to its physical appearance and chemical composition. Gold is one of the rare metals that do not tarnish or rust no matter of the air conditions it is submitted to. This property is due to the fact that gold doesn’t form any oxide on its surface under any circumstances. Continue reading →