How to identify true and false gold bracelets

Gold general appraisal method
It people used to use test gold stones in the past to determine the general content of gold. Testing gold stones are a mixed black mineral such as quartz and protein -containing quartz. Roughly color. Whether it is a natural gold or gold -made product, its color will change with the ingredients it contains. Pure gold: shiny dark yellow, thick yellow; silver gold: lighter colors, slightly green; gold containing silver greater than 25%: earth white; copper -containing gold: deeper color, red tone; silver containing silver; containing silver containing silver; Copper gold: yellow; gold containing zinc, copper, nickel: platinum.

has comparison to identify. The proportion of gold is 19.3 grams of 1 cubic centimeter, which is double the copper (8.5 grams of brass). The contrast is clear. As long as the weight is olored, comparison, it will be self -evident. Real gold is not afraid of fire. It is the reason that everyone knows. Put the gold jewelry in the fire and burn red. After cooling, if the surface is still golden yellow, it is real gold; if it becomes black, it is fake gold.
The hardness of the real gold is low, less than 3 (Mo's hardness is 0-10) to bite with teeth, leaving tooth marks. The lower the color, the harder, and the higher the color, the softer.
The authentication of golden and false
1. Watching the color of the color of the color is yellow in yellow, the pseudo -yellow is black, the seven green eight yellow nine five red red, the common hand ornaments are yellow and red, with a gold content of more than 95%.
. The weight of the weight of the weight is a fall in the hand, and the copper or other only sense of weight without falling.
3. The sound of the sound of the sound of the sound of the sound is 40 ~ 50 cm to let it fall. The beating more than 3 times is false. Generally, 1 or 2 times, the sound is the sound of the Qatar, the sound without rhyme is the real gold, the sound will be the dang, the sound will be the dang, there will The elders of Dang and Rhyme are fake

Golden colors identifying small formulas
people found in long -term practice that the color and luster of various colors are different from each other. The long -term observation and analysis, summarized the gold (colorful gold) formation formula- "Qiqing, Eight Huang, Jiu Baiji (or Jiukou Chi), four or six do not show gold."

Qiqing, which refers to 70 % (70 % gold), the color presented by gold is blue and yellow.
Eight yellow refers to the color presented by 80 % (80 % gold) gold.
The color of 90 % (90 % of gold) of gold (including 90 % of the gold) is the color of the color of the positive yellow.