wholesale jewelry findings dallas How to distinguish whether the gold ring is adulterated?

wholesale jewelry ornaments pakistan Among the longest views of people in the society, there are sand gold in the society; there is a colorful gold in cooked gold; the colorful gold is mainly based on all kinds of gold, gold strips, and gold utensils. The general method of identifying these gold authenticity is to use nitric acid. Most of them are gold, but there are also white gold (platinum) and a few precious metals.
The adulteration methods in sand gold, mainly:
(1)
The sand gold plating of brass, mixed copper and yellow iron mines;
(2)
The silver -doped silver -mixed silver gold;
(3)
The sand gold at the end of the furnace tank.
● Generally, the first type of adulteration sand gold can be preliminarily determined whether it is fake with an emergency burning. ; Or use sand acid to point its grinding road
. If the grinding tract changes or disappears, it is fake sand gold.
● In the second type of fake sand gold, because silver is not easy to be burned and discolored, the sand gold group can be used to open the section under the magnifying glass. Tao, if there is a white spot, is a silver -mixed sand.
● The third type of sand gold is the most deceptive, because the furnace cylinder ash is not afraid of burning or sour. At this time If the grinding road disappears, it is true sand gold. If there are still obvious traces, it is a fake sand gold at the end of the cylinder.
● There are tips for people's common golden golden gold identification in cooked gold, that is: weighing weight, looking at color, discussion rhyme, softness, and acid. Because golden density is significantly greater than common metals such as copper, silver, lead, and zinc, it is about twice as much as the same volume of silver and copper. If the items are gold, there is a heavy feeling. This is the "gold pending" of the people's ministry, otherwise it is light.
● Gold has its unique golden brown luster (low color exception). Pure gold will flashed with dazzling light under the strong light. This is not available in other metals, including copper inside.
● High -colored gold, the sound of the time when it is thrown in the ground has no rhyme and elasticity, and the golden sound quality with a low color is slightly brighter, and when the copper product is thrown on the ground, the sound is loud. Therefore, according to the sound of the knocks, we can help us distinguish between common metals and gold.
● Gold has the characteristics of good ductility and small hardness. Pure gold is folded and soft, and the bronze strips are laborious. Or use large head needles (nails are also fine). If the force is not large, the traces are obviously gold, and the copper is slightly larger and the traces are slightly worse. It is only difficult for gold bars, gold coins, bricks, and the like. The authenticity of the first judgment of gold is also effective, but it is necessary to use different orientation of the inspection objects. If the color of several grinding roads is obviously different, adulteration is undoubtedly mixed.
● When the above -mentioned several cooked gold identification methods are not believed, you can only use nitric acid, that is, use nitric acid to point its grinding road to determine its true or false.
◆ Golden jewelry identification
1. When the authentic is bending with hands, it is soft and easy to bend. The jewelry was thrown on the floor and made a "click" sound. The fake sound was bright, and the fake sound was high, and it jumped higher than the real gold.
3. The real color is dark yellow, the excessive red is pseudo -gold, and the light color is silver. Aluminum and other mixed alloys.
4. It is really heavier. The fake is lighter.
5. Really fire does not change color. After burning red, it is quenched into the water, and the color remains unchanged.