How can you tell the difference between gold and sand gold? How can you tell the difference between

ShakinIt is also a kind of **, produced at the bottom of the river or in low-lying areas, mixed with stone and sand, and is washed out later, and the gold content of the two is different:

1. The gold content is different: the gold content of sand gold is low, and the gold content is about 5%, while the ** seen in China is all pure gold.

The gold content is in. 2. Different degrees of softness and hardness: sand gold is hard in texture, China's first.

It's soft.

3. Different colors: The color of sand gold is golden yellow at first glance, and it is whitish when you look closely, and the color is real golden yellow.

1. Identify adulteration:

1. Whether there are white bright spots, cut the gold bars with materials.

or gold jewelry cut with a magnifying glass.

If you look at its section, if you see white bright spots, because ** and iridium cannot be fused together, it means that ** is mixed with iridium.

2. To measure the specific gravity, first measure the weight of a pure gold bar with a balance, then put the gold bar into a measuring cup, and pour water to submerge the gold bar. Then put the gold bar to be tested into the measuring cup, observe whether the scale of the water rises or falls, as long as it changes, it means that the gold bar is not pure gold. However, this method does not apply to gold jewelry, because there is air in it.

3. Real gold is not afraid of fire, put gold bars or gold jewelry on the fire for a while to observe its changes. As iridium binds with oxygen in the air, an oxidation reaction occurs.

Therefore, gold bars of insufficient purity will turn gray; Pure gold, on the other hand, will be red and shiny in color after being roasted by fire. However, this method may be destructive to jewelry.

The differences between Shajin and ** are:

1. The origin is different.

**Includes rock gold and sand gold in the form of underground, and sand gold is produced in riverbed areas. Shajin is under the riverbed, often mixed with stone sand, and washed out to become **.

2. The shape and appearance are different.

Shajin is generally in a granular state, with different sizes, the large ones are the size of broad beans, and the small ones are like fine sand, and the ** is generally a relatively regular shape.

3. The gold content is different.

The gold content of sand gold is equivalent to 95% and 96% of the gold content**.

First, the gold content is different.

**There are four textures, namely pure gold, colored gold, mixed gold and K gold, of which pure gold has the highest purity, which is what we often call thousand-foot gold.

The sand gold can generally only reach 99 gold, and the gold content is very low at about 5%.

Second, the color is different.

The color of ** is golden, and the color of sand gold is different according to the amount of ** it brings, the high gold content is darker, and the low gold content is lighter.

Most of the sand gold is reddish-yellow in color, but there are also some pale yellow and blue-yellow.

Third, the processing cost is different.

The purity is high, the impurities are few, the extraction process is relatively simple, and the current domestic processing system is also very mature, so the processing cost is controllable.

The purity of sand gold is low, there are many impurities, the extraction process is complex, and the processing cost is high.

Fourth, ** different.

**Calculated on a per gram basis.

Sand gold jewelry is according to each piece **.

To distinguish sand gold and **, first of all, look at their appearance, the color of sand gold is relatively light, with a texture similar to sand, and the color of Chang is more bright, with a metal-like texture. Secondly, it can be detected with a metallograph, the metal composition of sand gold is more complex, and the metal composition of ** is relatively simple, and the metallographic instrument hail can withstand the shed to detect their metal composition, so as to distinguish sand gold and **.