1. Observe the color
First, you can look at its color. The higher the purity, the whiter the color, but it is easily oxidized and appears black. Although the oxidized color is a little black, it is very bright.
2. Flexibility
The real silver necklace is not only white and bright, but also flexible, while the fake silver necklace is much less flexible.
Weigh.
People often say: "aluminum is light, silver is heavy, and copper is not light or heavy." So we can judge whether it is a silver necklace by weighing its mass.
Test hardness
The hardness of pure silver is lower than copper, but higher than lead and tin. When we choose a silver necklace, we can put a hard object on it to experiment. If there is slippage and there is no impression on the surface, silver can be excluded.
5. Listen to the voice and tell the difference.
Hit the floor, a piece of sterling silver jewelry, no elasticity, issued a "bam" sound. The lower the color, the lower the sound, and the sharper and higher the rhyming sound.
Extended data:
Solutions to blackening of silver ornaments;
If the silver jewelry turns black, don't rush to wash it with silver water, because silver water is a chemical agent and has a certain corrosive effect on the jewelry.
Silver cloth is your first choice. There are many small remedies, such as soaking silver jewelry in cola overnight or brushing it with a soft brush dipped in toothpaste, but be sure to dry the water with cotton cloth after washing.
References:
Baidu encyclopedia-silver jewelry