5 thoughts on “Ancient Golden ingot, how to distinguish the copper Jin ingot, hello, I have an ingot, I don't know if it is gold or copper. How can I distinguish it?”
Leave a Comment
You must be logged in to post a comment.
You must be logged in to post a comment.
The proportion of gold and copper is different, you can measure their proportion
The copper is easy to oxidize, you can see their oxide
1. The identification of the authenticity of the gold, there are several simple methods: more weight method. Putting gold on the palm is heavy, and the copper is obviously light. Nitric acid discerning method. In nitric acid, gold is safe, but the copper immediately emerges with green smoke. Fire burning method. Real gold fire does not deform and does not change color. Carving. The golden hardness is low, and there will be traces with a knife or bite with your teeth. Taste. Put the gold in your mouth and lick with your tongue for a while, and then smoke. If the jewelry is copper, the mouth has a sweet taste in the mouth, and the gold has no odor.
2. The best way to identify gold is to use the goldstone. Its mineral name is Bixuanyan
The solid ones can be determined according to the density that the density of copper is much smaller than the density of gold. The volume and weight of the ingot is measured, and the weight is divided into density with the size.
It will be known to go to a professional appraisal agency. If you don't believe that you can measure the density of this ingot, the density of copper is less than the density of gold than the density of gold.
Copper has been rusty now, and gold will not be oxidized. It is easy to distinguish between gold and copper.