What is emerald? Simply put, emerald is a kind of gemstone, a kind of emerald, a very precious gem, because its beauty and its scarcity make it an extraordinary price, then let's introduce it in detail. What is emerald.
The English beryl is beryl, which is derived from the Greek beryllos (green stone) and slowly evolved from the Latin beryllus.
Reference to the Gem of Local Gemstones (GIG) research report: emerald English is emerald, derived from Persian zumurud (Emerald), later evolved into Latin smaragdus, rumored to esmeraude, emeraude, and then become English spelling. Chinese is transliterated. Tao Zongyi transliterated in his "è¾è€•å½•" as "helping wood thorn". The old fashions in our country are called “Mother Green†and “Help Water Greenâ€. Hong Kong is also known as "Luzon Green".
Emerald is known as the king of emeralds and is one of the most precious gems (the birthstone of May).
Emerald is one of the most ancient gemstones used in ancient Egypt. The famous mine at the time, Cleopatra (the name of Cleopatra), has been exhausted by extensive mining.
It is difficult for emeralds to find innocent gems. In fact, it can be said that there are some cracks and inclusions in the emerald gemstone, and the variety of crack inclusions is complicated, even called “garden†by researchers.
Too much inclusions naturally affect the value of the gemstone, but for gemologists, the emerald's inclusions are rare samples, and by observing the different inclusions, the difference in gemstone origin can be distinguished. And its growing environment.
Although the emerald's inclusions greatly affect the beauty of the gemstone, its beautiful green color is still no match for other gemstones.
The emerald green comes from the chrome ions inside it, which can be observed by Charles filter.
Under the Charles filter, most of the emeralds appear dark red due to the presence of chromium ions, while other green substitutes are mostly dark green. This rule can only be used as a reference for identification. It cannot be used to determine the authenticity, because some African-made emeralds are not red under the color filter. On the contrary, some artificial emeralds have a strong red color.
The emerald is a family of beryl, which is a hexagonal system.
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Emerald crystals are often hexagonal, with few facets. There are pits on the cylinder and bottom surface.
Due to the formation of the rock that is often subjected to stress extrusion, the appearance of the emerald crystal is almost broken, and there are many inclusions. The crystal integrity is extremely rare.
The green color of emeralds is not the same as the color of other natural emeralds, and its rich inclusions can be distinguished by more experienced people.
As for synthetic gems, the effort to synthesize emeralds can be said to be a successor. Basically, synthetic emeralds are made by hydrothermal or fluxing methods rather than the Vilnius method.
There is a limitation in the manufacture of synthetic gemstones by the Vilnius method. This method is only suitable for making gemstones whose composition is stable at high temperatures, such as corundum and spinel, but the emerald is a silicate whose composition has not yet reached the Vilnius. The temperature required by the law will decompose and is therefore not applicable. The process of hydrothermal process of emerald is mainly to put the seed crystal into the solution containing emerald ingredients to make it slowly crystallize. The gems after crystallization are pure and flawless, and the contents of many emeralds with natural emeralds Not quite.
Therefore, the imitation will add some flux in the process, so that the artificial emerald can produce natural cloud-like inclusions after crystallization, and the shape of the inclusions varies depending on the type of flux. It can often form a very interesting pattern.
Due to the excessive number of cracks, the optimization of emerald treatment is mainly in dealing with cracks.
The most famous optimization treatment of emerald is oil immersion treatment. If the crack of emerald extends to its surface, it will be soaked with a special kind of grease, so that the crack is less obvious due to oil immersion. On many poor quality emeralds.
Sometimes even after the oil immersion treatment, the crack inlet is covered with a special material to avoid oil leakage.
Emerald has been one of the precious stones since ancient times. According to legend, 6,000 years ago, there were people in Babylon who presented it to the statue of the goddess. In the ancient Chaldeans of the Persian Gulf, women especially love emerald jewelry. Ancient Egypt and the ancient Greeks thousands of years ago also liked to use emeralds for jewelry. Chinese people are also very fond of emeralds. The emperors of the Ming and Qing dynasties were especially emeralds. The Emperor of the Ming Dynasty regarded it as precious as the golden-green cat's eye, and said that "the ceremony requires cat eyes and emeralds." Ming Wanli Emperor's jade belt is set with a large emerald, which is now in the Ming Tombs of the Ming Tombs Museum. In addition to the large number of pearls and other precious stones, the golden silk casket covered by the Empress Dowager Cixi has two emeralds weighing about 5 yuan each.
Emerald is the birthstone of May. It symbolizes luck and happiness. Wearing it will bring peace to life. It is also a memorial stone for the 55th anniversary of marriage.
Emerald is a very old gem that has been used as jewelry in ancient Egypt.
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price
The price of emerald is based on the different parameters of the gem to identify his price! Generally, if we wear it ourselves, the price will range from 5000-3W.
Color characteristics
The color of emerald is very attractive. Some people describe it with spinach green, green onion, and green bud green, but they can't accurately express its color. It has a yellowish green color, and it seems to have a little blue. Even the spectrum seems to be missing the dot wavelength. Indeed, no natural color makes the eyes so comfortable. Whenever you look at the verdant lawns and leaves, the pleasing sensation is imaginable, but it is inferior to the emerald color. It is one of the gemstones that can never be seen. Whether it's cloudy or sunny, whether it's an artificial light source or a natural light source, it always glows softly and radiantly. This is the king of green gems - the charm of emeralds.
Emerald is a gem-quality green beryl. The green color should reach medium to reach a rich green tone, that is, the concentration of the color should be relatively saturated. Light green is often referred to as green beryl.
The beryl is produced by nature and its main component is Be3Al2[Si6O18], which has a hexagonal symmetrical aluminosilicate mineral. Emerald is formed due to the proper amount of Cr2O3 (0.15~0.6%). It is the most outstanding member of the beryl family. The material is a high-grade gem.
Its color source is: traces of chromium oxide make it appear crystal clear green.
Physical and chemical ingredients
Citing the Asian Gemological Association (GIG) study: Emerald is a bismuth-containing silicate with a molecular formula of Be3Al2[Si6O18], which is one of the most noble members of the beryl family. It belongs to the hexagonal system. The crystal form is a hexagonal column, a hexagonal double cone, and most of them are rectangular columns. The aggregate is granular, massive, and the like. Emerald green, glass luster, transparent to translucent. The refractive index is 1.564-1.602, the birefringence is 0.005-0.009, and the chromaticity is not obvious. Heterogeneous. Hardness 7.5, density 2.63-2.90 g / cm3. The cleavage is not complete, the shell-like fracture. Brittle. Under X-rays, the emerald emits a weak, pure red fluorescence.
Emeralds and diamonds, rubies, sapphires and the world's four famous gems. Its chemical name is: yttrium aluminum silicate Be3AL2Si6O18) belongs to the beryl family. It is crystal clear green with a trace of "chromium". Its physical properties: (1) hardness: 7.5 ~ 8. (2) Density: 2.67 to 2.78 g/cm3. (3) Refractive index: 1.56 to 1.60. (4) Birefringence: 0.004 to 0.010. (5) Gloss: Glass luster.
We introduced the emerald green through the name of emerald, the introduction of emerald, its price, color characteristics, physical and chemical composition, etc. We hope to help everyone!
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