On the contrary, we often say that plain gold refers to precious metal jewelry that is not inlaid with jewels and jade (such as diamonds), such as plain gold rings, plain gold earrings and plain gold necklaces.
Gold jewelry refers to jewelry made of gold as the main raw material.
Gold jewelry with Mohs hardness can be divided into pure gold and k gold according to its gold content.
The gold content of pure gold jewelry is above 99%, and the highest can reach 99.99%, so it is also called "99 gold", "all gold" and "red gold".
In order to overcome the shortcomings of gold, such as high price, low hardness, single color, easy wear and delicate pattern, some other metal elements are usually added to pure gold to increase the hardness of jewelry gold, change its color tone and lower its melting point, so that gold alloy jewelry with different colors and obviously different gold contents appears, and is marked with the word "Kai".
K-gold system is an internationally accepted standard of gold measurement. The complete characterization of K-gold is "K-gold", which gives K-gold an accurate gold content standard, thus forming K-gold jewelry series.
Extended data:
Maintenance methods of gold jewelry:
1, cleaning chemicals will change the color of gold, so take off the gold ornaments before cleaning.
2. Avoid direct contact with volatile substances such as perfume and hair gel, otherwise it will easily lead to the fading of gold ornaments.
3. Take off the gold ornaments when swimming to avoid chemical changes on the surface after contact with seawater or pool water.
4. Wrap it in flannel and put it in a jewelry box when keeping it to avoid mutual friction and damage.
5. Gold is soft and easy to deform. Do not pull necklaces and other accessories to avoid deformation.
6. Pure gold jewelry will react chemically when it encounters mercury, and white spots will appear. When cleaning, as long as you barbecue under the alcohol lamp for a while, it will return to its original color.
7. After wearing, gold ornaments often lose their luster due to stains and dust. At this time, just put the gold ornaments in a neutral detergent, soak them in warm water, and then take them out and dry them.
Baidu Encyclopedia _ Gold Jewelry
Baidu Encyclopedia _ Su Jin