How can you tell a natural diamond from a fake

How can you tell a natural diamond from a fake


How to distinguish a diamond from an imitation
There are a lot of imitations of a diamond on the market today. These include all materials similar in appearance to a diamond (glass, rhinestone, cubic zirconia, zircon, colorless sapphire, etc.). The characteristic appearance of a diamond is determined by the complex effect of the "diamond" luster of its surface, the perfection of polishing, sparkling, and lights.
When diagnosing diamonds, visual and instrumental methods can be used. Optical diagnostics is based on an understanding of the following principles:

1. More light is reflected from the surface of a diamond than from any other natural colorless stone. Synthetic ruby can reflect even more light than diamond, and cubic zirconia reflects light almost as well as diamond. By tilting the diamond so that the reflection of the electric lamp appears on the surface of the platform, you can see that it is not distorted.
2. Diamonds are processed so that almost all the light enters the stone from a series of mirrors. Therefore, if a well-cut diamond is looked at by dawn, only a luminous point in the spike will be visible and nothing more. Suppose you look through the diamond in the ring worn on the finger. In that case, it is impossible to see the finger through it (due to complete internal reflection). In contrast, the finger is visible through stones with a lower refractive index.
3. The diamond is well moistened with fats, so a greasy film remains on the surface of the cut stone after it has been taken by hand.
4. A diamond has sharp edges due to its high hardness or clearly defined boundaries between adjacent planes and faces. In contrast, imitations are made of softer materials. Under a magnifying glass, the edges between their faces are less sharp and look more rounded.
5. Due to the reduced hardness, chips and scratches are often formed on imitations.
In the last decade, a new imitation of diamond has appeared on the market - synthetic moissanite, which has a very spectacular appearance and looks good in jewelry.
Currently, devices for diamond diagnostics are sold in specialized stores and at jewelry exhibitions. They are called diamond detectors. Their action is based on the study of the thermal conductivity of diamond and its imitations.