The gold earrings were dirty. When I saw that all the shops burned them with that musket, I tried to burn them with a lighter. I didn't expect them to burn black. What should I do?

Hehe, gold ornaments can't be burned by themselves. Last time I burned them with a lighter like you, and it turned dark. Then I ran to the store and asked my boss, suspecting that they were fake, and it turned out to be a joke. My lighter couldn't reach the fire temperature, so I had to go to the gold store, where he specialized in making gold. I watched him burn them, and the color became normal immediately. Please ask in the store you bought, don't worry.