During the French Medieval period, emerald is called emeraude. The old Latin for emerald is esmeraldus or smaragdus in Latin.  Emerald in Greek is smaragdos which literally means “green gem” or “to shine” in the Semitic language. The name emerald is very much recognized by its bright green color. It is being used pragmatically as a gemstone or to be particular, as a precious stone. The emerald ranks as one of the most highly prized varieties of precious stones. For centuries, this precious stone was known not only because of its beauty and elegance but also because of the belief that it has the apparent ability to cure diseases and some illness of the eye.
The emerald is an unsurpassed formation of the mineral compound beryllium aluminum silicate, commonly called as beryl. Emerald is green due to the presence of chromium. The emerald has a relative density of 2.5 to 3.0 and having a firmness and solidity of 8.0 on the Mohs scale. It is for the most part basically impossible to tell apart from the other types and varieties of beryl in structure, components, and properties, but does eventually take in and comprise adequate chromium to divulge and convey a bright green color. Sometimes, emeralds are capable of holding a particular amount of featherlike matter, which is termed and every so often called “silk”. “Silk” which particularly brings out the emerald’s moss-covered or a mossy appearance.
It is difficult to find high quality emerald stones. Most emeralds in the market contain flaws or inclusions. The truth is that flawless emeralds are very rare and very expensive. Emeralds of the highest quality would still have a few inclusions. These inclusions, fissures, or bubbles make it difficult to cut an emerald. The inclusions an emerald has the more brittle it becomes and the more it affects it color and spoil its tranparency. Therefore, the lower its value is in the market.
Emeralds, including rubies, sapphires, amethysts and other related gemstones are doubly refracting. A gemologists, which are the ones scientifically involved in studying gems and gemstones, uses an instrument which is called a refractometer which is used to measure the characteristic properties of the stone, better known as the refractive index, which is its relative ability to refract light. Specimens without any blemish or imperfection, or flawless and impeccable perhaps, which are of good size and color are to an unusual high degree becoming rare and demands much higher prices than some diamonds of the equivalent weight.
Emeralds, together with diamonds and rubies represent one of the greatest attentiveness and concentration when it comes to monetary values. The market price of this precious stone will not be given such fixed purposes and determined until the precious stone is being assessed and made to cut. Scientists and gemologists can also amalgamate or produce emeralds eventually in laboratories, even though cautious and conscientious analysis and examinations can distinctively detach the synthetic gemstones from the real natural emeralds.
Emeralds occur naturally in many countries. In ancient times, emeralds were burrowed or mined principally in Egypt. In Siberia, Eastern part of Russia, very large specimens have been brought into being, better yet found, and in Colombia, from the north eastern part of the South American continent where most gem specimens are presently being mined.
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