The real gold ring will not rebound when thrown on the table, but will only make a "click"; Counterfeit money will bounce back and make a long, sharp sound.

Step 2 identify the weight

The proportion of gold is second only to platinum, so the real gold ring feels like falling into the palm of your hand. And fakes are lighter.

judge colours

Gold has a smooth surface, no rough spots, red and yellow color, good color and no discoloration after long-term storage; The color of counterfeit products is not red or yellow, but also cyan or gray. Over time, silver will turn black, copper will turn green, and real gold will never change color.

Determine quality

After pulling the gold ring, bend it a few times. If it doesn't stop, it's real gold, and there are creases in the bend. And if there is no crease in the fracture or bend, it is a fake.

5. Use stones and 45% nitric acid solution to test the authenticity.

Rub the ring on the stone for more than ten times, and then try dropping a drop of 45% nitric acid on the golden path left on the stone. If the golden path disappears soon, it is false; If the golden path never disappears, it is a real gold product.

6. Density discrimination

The density of real gold is about twice that of silver, lead and tin with the same volume. Available formula: the mass (gram) of a real gold ring is equal to the density (cubic centimeter) of a real gold ring. Find the density of the ring. If the density is about 19.32g/cm3, it is real gold, otherwise it is fake gold.