Emerald, known as the king of emeralds, is a very precious gem (May Birthstone) and one of the four precious gems (red, blue, emerald and diamond) recognized by the international jewelry industry. Because of its unique green color, unique charm and magical legend, it is deeply favored by westerners. Emerald symbolizes kindness, self-confidence, kindness, eternity, luck and happiness. Wearing it will bring peace to people's life. This is also the 55th wedding anniversary stone. Emerald is a very old gem, which was used as jewelry in ancient Egypt.

Chinese name: Emerald

emerald

Yan? Color:? green

Beautiful? Say: King of Emerald

Chemical composition:? Beryllium silicate [1]?

Crystal? System: hexagonal system [1]?

Light? Ze:? Polished surface glass luster

Light? Sex:? Negative optical properties of uniaxial crystals [1]?

Refractive index:? 1.577- 1.583( 0.0 17)[ 1]?

Double discount rate:? 0.005-0.009

Work hard? Degree:? 7.5-8

Relative density:? 2.67-2.90

Whether it is true emerald can be basically determined by the following exclusion method, # w &；; G Ying Ji jewelry # expert decomposition, how to identify emeralds.

How to distinguish between true and false emeralds?

Mainly depends on its internal inclusions, which are commonly known as impurities. Natural emeralds have more or less impurities, while artificial emeralds are very high in purity, and even with artificial inclusions, they are obviously different from natural emeralds.

1. You can observe it with a color filter called Chelsea Color Filter. The red ones are emeralds, and the green ones are other natural gems.

2. According to the characteristics of emerald, its refractive index is low and there is no refraction phenomenon, while gems like green diamonds have dazzling diamond luster.

You can look inside with a magnifying glass. Natural emeralds generally have solid, liquid and gas mixed inclusions, while artificial inclusions are mostly gas or gas-liquid mixed inclusions, often in the form of smoke clouds or plumes. Of course, some manufacturers will use chemical coatings to cover up the true face of gems;

In addition, the proportion of emeralds is lighter than that of many precious stones. For people who have been in contact with jewelry for a long time, holding it in their hands is also the easiest way.

5. Appraisal certificate issued by national authoritative appraisal institution? It is the most reliable appraisal method to ask an authoritative appraisal institution with national and international qualifications to help with the appraisal and issue a certificate.

Want to know more about jewelry, www.wgjewel.com Ying Ji jewelry, there will be more surprises!