white
Paper marking test method: draw a black line on white paper, and put the surface side of the diamond on the diamond ring on that line. If you can't see that line, it means that the diamond ring is real. If you can see it, it is fake. Special oily ink
When making a pen or ballpoint pen, draw a line on the diamond table of the diamond ring. If you leave an uninterrupted straight line, it means that the diamond ring is real. However, if there are intermittent dotted lines at the scribing point, it means imitation. But with this,
Methods The experiment needs to be observed with a magnifying glass.
Water drop test: drop a drop of water on the diamond ring. If the water drops remain spherical for a long time, it means that the diamond ring is real, and if the water drops are in the diamond ring,
Spreading out in a relatively short time is imitation. I have tried to customize my husband's real name online before.
happy
keep
this
The diamond ring dripped water, and the water stayed for five minutes. Finally, I'm too lazy to wait until it dries. Hehe, thank my husband for giving it to me in his name, which will accompany me all my life.
happy
keep
this
True feelings, what ~ ~
Breath test method: Breathe into the diamond ring. If the water vapor on the diamond ring disappears immediately, it is a real diamond ring. If the water vapor stays on the diamond ring for a few seconds, it is an imitation.
Touch test method: diamond has strong oil adsorption, and it will feel sticky when touched with fingers.
This is not found in other gems. In this way, it is necessary to strengthen the training of finger touch.
single
Refraction test method:
The essential characteristics of diamond determine the single refraction of diamond ring. While other natural gemstones or artificial gem are mostly birefringent. When the fake diamond is observed with a magnifying glass of 10 times, it is easy to see angular lines from the slightly inclined front.
Overlapping images appear and two bottom lights appear at the same time. A well-cut diamond is compared with a fake under the incandescent light of 100 degree, and it is easy to compare which one has diamond luster. But this method can't be too dark or too dark.
In the bright light.
2, professional distinguish between true and false
Hardness test: Diamond is the hardest natural substance known, and nothing can mark it. If it can be marked, it is definitely not a diamond.
Thermal conductivity test: Breathe into diamonds and other similar objects at the same time. If it is a diamond, the water mist condensed on its surface should evaporate faster than other objects, because the thermal conductivity of the diamond is high.
Observe the reflected light: with a magnifying glass, you can observe that the waist of the diamond presents a very fine matte shape, and the reflected light shines. This characteristic of diamonds is unique.
Look at the growth point: under the magnifying glass, there are often grooves and triangular growth points on the crystal face of real diamonds, while there are three kinds of fakes: ① ordinary glass plus alumina, due to the improvement of refractive index and dispersion,
Error-prone, but low hardness. (2) Imitated with chemically synthesized sapphire and colorless spinel, the hardness is similar, but the refractive index is low and has birefringence, and the double image can be seen under a magnifying glass.
the same
Quasi-chemical composition detection: the chemical composition of pencil is the same as that of diamond, but the physical structure is different, so many people use pencil to detect the authenticity of diamond, which is a practical and effective method.
Wet the diamond with water first, and then carve it gently with a pencil. On the crystal face of a real diamond, there is no trace where the pencil crosses, but if it is not a diamond, it will leave traces on the surface of glass, crystal and other materials.
Traces, generally speaking, are marked with pencils to identify the authenticity of diamonds. This method has high accuracy.