If calculated by volume, one gram of gold is about 0.052 cubic meters, which is about the size of a cube with a side length of 0.2cm and slightly larger than a grain of rice. If you compare coins, the diameter of one gram of gold is about 1 1mm, and the thickness is about 0.54 mm.

Maintenance methods of gold jewelry:

Gold is soft and easy to deform, so don't pull necklaces and other accessories to avoid deformation. When you don't wear it for a long time, you should wrap it in flannel and put it in a jewelry box to avoid rubbing against other jewelry.

Chemicals such as detergents and disinfectants will change the color of gold, so gold ornaments should be removed before cleaning and swimming to avoid chemical changes on the surface.

Pure gold jewelry should avoid direct contact with cosmetics such as perfume and hair gel. When it comes to cosmetics containing mercury and lead, it will have a chemical reaction, which will easily lead to white spots on the surface of gold jewelry. At this time, as long as you bake under the alcohol lamp for a while, you can restore the original color. If you can't solve it, you can take it to a gold and silver jewelry store for professional jewelry care.