A. Weigh the whole piece of jewelry with a weighing instrument and record it as: Zong; ;

B. Fill a small measuring cup with water and put it under the measuring cup with a tray. Please keep the tray clean and free of water, and gently put the whole jewelry into the small cup. At this time, some water will overflow into the tray.

C, measure the volume of water in the tray with a precision measuring cup, and record it as: V(ML converted into m3);

D, and then multiply the gold density13.6 *10.3 kg/m 3 by v; The weight of the same volume of gold is recorded as Sejong.

E If the gold content is high, there is little difference between Zong and Sejong; if the gold content is low, the error between them will be great.

F, the above method can only qualitatively detect whether the gold content is pure gold, and the quantitative detection is estimated to go to the jewelry testing station.