To test if your gold is real, you can perform a bleach test. First, make a small scratch on the gold to create a bare spot. Next, apply a drop of household bleach to the scratch. If the gold is real, the bleach will not have any effect. If the gold is fake, the bleach will cause the gold to change color .
Please note that bleach can’t tell you if your gold is fake. Instead, it can only tell you if it’s 100% pure 24K gold, since pure gold doesn’t react with bleach. But in many cases, other metals are mixed into gold to give it strength or change its color—like with rose or white gold—and even yellow gold isn’t always pure.
I hope this helps!
