For example, if you have10g of gold, then you will lose1.3g at a loss of 13%. It's already a great loss. So 13% is just a symbolic number. As long as your gold content is sufficient, the loss can be completely controlled within 2%.
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As you said, the price of gold jewelry has different valuation methods in different places. In big cities and famous jewelry stores, the price of gold is added with manual fees, and the processing fees of fine workmanship are higher, such as necklaces, bracelets, rings and earrings. And the processing fee is lower. Below average cities are priced by weight.
The total processing fee for the 45 grams of gold jewelry you bought is 1 000 yuan, with an average of 22.22 yuan per gram. Personally, I think it's a little expensive. Ring earrings per gram 10 yuan, necklaces and bracelets are more reasonable. For example, a ring is 5g, and the processing fee is 50 yuan, which is quite a lot. General gold ornaments do not need to pursue famous brands.
It's the same whether you use money or grams. Take this one you bought as an example, 3.75 grams is 667 yuan, which is equivalent to 0/77.87 yuan per gram. If it is 557 yuan, buy 3. 125 grams, which is equivalent to 78.54 yuan per gram/kloc-0.
By contrast, you didn't get killed, but you still have a small advantage. China's gold scales and medicine scales can continue to use the old system, which is not limited by the reform of the scale system, so the old scale system can be used. The old scale system is two per catty 16, and per catty 10 yuan. The weighing system is 597 grams per catty, and if calculated by 600 grams, it is 37.5 grams per catty and 3.75 grams per catty. If calculated by 500 grams per catty, it is 660.
Logo:
1. You can go to the local jewelry appraisal center or quality supervision bureau for appraisal, and it won't melt without heating.
2, the handling fee is not expensive, generally within 50 yuan.
Gold will not decrease after processing. Matters needing attention in gold maintenance:
1, not suitable for wearing with gold jewelry. Because gold is soft, if it rubs against each other, it will not only damage the gold ornaments, but also dye gold on platinum, turning yellow and difficult to remove.
_2, 18K gold necklaces are generally delicate, so you should be especially careful when wearing them, and you should not pull them hard, so as to minimize the pulling and friction of external forces and prevent the structure from deformation and fracture.
Machine processing technology
(1) lost wax casting process
Lost wax casting is the most important production process in jewelry industry today, and lost wax casting jewelry has also become the mainstream product of jewelry today. The casting process is suitable for jewelry with obvious concave-convex shape and can be produced in large quantities.
The technological process of lost wax casting is: making metal model-pressing rubber model-injecting wax model-planting wax tree-pouring gypsum model-casting.
(2) Stamping process
Stamping process, also known as die stamping and embossing, is a kind of embossing pattern manufacturing process. The steps are as follows: first, make a mold according to the master mold, and then make a relief pattern on the metal through pressure.
Stamping process: stamping patterns, forming (bending), and bonding (usually with solder).
The stamping process is suitable for ornaments with uneven bottom, such as small lock pieces or articles with inconspicuous undulations, and it is easy to punch or combine in two or more steps. In addition, extremely thin parts and jewelry with exquisite detail patterns also need stamping process.
(1) electroplating process
Electroplating process is a kind of processing method to electroplate the surface of precious metal jewelry, such as gold plating on silver jewelry and rhodium plating on platinum jewelry.
The main process of jewelry electroplating is: acid and alkali washing-degreasing and polishing-electroplating. Electroplating process can protect the surface color and brightness of precious metal jewelry and make the jewelry look more beautiful.