A diamond earrings may contain foreign substances, and their number determines the quality of a gemstone. Foreign substances are internal characteristics, they are called inclusions (cracks, white “ice”, a dark carbon), which appeared on the stage of crystal formation.
Also, the quality of the stone impact and external characteristics (extra facets, scratches and other defects) that have arisen at the time of processing and eliminated in the process of grinding the diamond. Assigning a diamond grade of purity depends on the distribution and size of these characteristics. For the measurement used as a standard magnifying glass with a tenfold increase.
The qualitative characteristics of the diamond
* The international scale of diamond purity
Absolutely clean “diamond of pure water” – “under a magnifying glass clean» (loupe) is a diamond, which is in the analysis completely transparent, without any inclusions.
purity of a diamond.
2. VVS * (Very Very Small) (VVS 1, VVS 2)
Almost invisible inclusions, which are imperceptible even at tenfold magnification.
3. VS * (Very Small) (VS 1, VS 2)
Very small defects which are not definable by almost tenfold increase.
4. S * (Small Inclusions) (SI 1, SI 2)
Minor inclusions that are visible with a tenfold increase, but are invisible to the naked eye and does not violate the brilliant shine.
5. PI (Pique)
Secondary inclusions are easily detectable with a tenfold increase. They are slightly noticeable, but, as always, do not violate the brilliant shine.
6. P II (Pique II)
Numerous and large inclusions visible to the eye, but do not violate the brilliant shine.
7. P III (Pique III)
Numerous and large flaws visible to the eye and reduce the brilliant shine.
Now, few words about how to distinguish fake of original diamond.
When viewing diamond earrings with the naked eye or with tenfold magnifying glass, you need to bear in mind that it is handled in such way that almost all the light entering the stone through the crown, is fully reflected from its rear face, as on a number of mirrors.
Therefore, if a cut diamond to look at the light, you will see only a luminous point in the stone. In addition, if you look through the diamond, which is in wearing the ring on your finger, then to the the finger through it is impossible.
The chemist Klaproth found that a drop of hydrochloric acid has no effect on the diamond, but on zircon it leaves muddy spot.
Diamond leaves a scratch on the surface of the glass, as well as on the polished surface of other stones.
To distinguish the diamond from a synthetic spinel and sapphire stones are immersed in a colorless liquid with a refractive index close to the refractive indices of sapphire and spinel (methylene iodide). Spinel and sapphire, will simply not be visible in the liquid, and the diamond will shine brightly. A similar but less distinct effect of the “disappearance” rhinestone give plain water and glycerol.
To simulate the diamond, it is used colorless zircon, strontium titanite, colorless synthetic spinel, synthetic colorless sapphire.