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What is the substitute for natural emerald?
Currently, emerald is not a very expensive stone, since the stones cut from the vast majority of raw materials are translucent or have very large internal defects, often turning into external ones. We should also dwell on color. The overwhelming number of stones mined now rarely have a color that exceeds the value "3" in faceted inserts (in accordance with TU-95 335-88 "Treated natural emeralds" adopted in Russia). Emeralds with a color and quality corresponding to really expensive stones are rare. Of course, on the market for jewelry stones and products, it will not be difficult to find a product with a rich green and completely transparent (without areas with partial loss of transparency) emerald, despite their rarity. The lack of deep green and clear emeralds is often compensated by refining stones in color and clarity, as well as synthetic stones. Simulations are also used to a lesser extent for this purpose. Among the refined stones, emeralds predominate with filling of cracks with vegetable oils and resins, artificial resins and a combination of artificial and natural aggregates. Sometimes there are stones with filling of surface cavities with wax or artificial resins. Imitations include rarely, but regularly occurring very pale green or colorless beryls, superficially colored green or filled with a dye along cracks. Among the classic imitations, emerald / glass and beryl / glass doublets prevail. Yttrium-aluminum garnet (YAG) can often be offered under the guise of an emerald. Synthetic emeralds under the guise of natural ones are relatively rare, but sometimes stones with a "built-up" thin layer of synthetic emerald on a seed made of natural beryl come across. Such stones are the most difficult to diagnose and require special attention. The sale of imitations of emerald in the form of glass, tourmaline or other colored stones is more often determined by the lack of information about the stone from the selling side than by malicious intent.
The stone, later called "dianite", macroscopically is a dense rock of cryptocrystalline structure, characterized by bluish-gray and blue colors. ...
From an inexperienced point of view, it may seem that the central part of the East European platform, namely the region of the Moscow region, is deprived of gems. ...
We are starting a new cycle of publications about great researchers in the field of gemology and mineralogy. ...
We continue the cycle of significant days and people in gemology and mineralogy ...
The main indigenous industrial sources of diamonds are kimberlites and lamproites – alkaline-ultrabasic rocks of ancient platforms, forming mainly tube-shaped bodies, dikes and veins. ...
The world's largest platform for trade with diamonds is the "Rapaport", the price lists which guided the vast majority of diamond merchants in the world ...
When a Gemological study of stones and other jewelry gemologists use a wide range of equipment ...
Defects in jewelry significantly affect its consumer properties as a luxury, a decoration or status of the accessory, and, accordingly, limit its scope or make completely unusable ...
During one of the diagnostic examinations in our laboratory, the study of jewelry inserts in jewelry imitating black diamond, identified a variety of boron carbide a black color ...
The definition of authenticity, including tributaria, jewelry is a highly demanded field of expertise associated with expertise of the jewelry. Very relevant these types of activities when making secured transactions or sale-purchase jewelry in the ...
As is known, the motivation of consumers is an important aspect that is of particular importance for the prospects of market development, diamond products are most often purchased on the occasion of significant events and celebrations as gifts. One ...
As is known, the motivation of consumers is an important aspect that is of particular importance for the prospects of market development, diamond products are most often purchased on the occasion of significant events and celebrations as gifts. One ...
The definition of a gemstones, its origin and methods of refinement, if such has been applied, is one of the main objectives of Gemological expertise by expert Gemological laboratories ...
The lab was presented the crystal, in appearance resembling a natural diamond. The stone had a light-green color, the shape close to octahedral, and the weight of 9.71 ct. Its size was of 11.79 x 11.61 x 9,69 mm. ...
In determining the authenticity of a diamond, a gemologist should determine: Is this diamond made of diamond and is it natural; Has a diamond been trimmed to improve color and or clarity; The quality characteristics of the diamond " ...
This note will be useful to jewelry owners who wish to return, exchange jewelry that does not meet the requirements and expectations of the consumer. ...
The color of most natural topaz is associated with radiation defects in the structure of the crystal lattice of the stone. But, as a rule, natural stones do not possess residual radioactivity. Exceptions can be stones with internal inclusions of min ...
For the first time, the term “Pigeon’s Blood” (“Pigeon Blood”) was introduced by GRS (Gemresearch Swisslab) in 1996 for the qualitative characterization of ruby color in gemmological reports. In 1998, rubies with gemological reports describing color ...
When buying a diamond, it is important to understand which components form the price of a diamond. ...
Verification of the gemstone for authenticity, as a rule, consists in checking the gemstone (insert) for compliance with the information stated during the sale-purchase ...
Everyone who ever bought or wanted to buy expensive jewelry with precious stones in the secondary market, faced with the need to check the stones in the product for authenticity and for compliance with the data stated by the seller. ...
Inclusions in stones is one of the diagnostic signs, because a detailed study of them can often help establish the nature of origin, the presence of external influences (refinement), and sometimes even the deposit and conditions for stone formation. ...
In Russian, the term “amber” is borrowed from Lithuanian from “gintãras” - the name of lithified resin fossils from the coast of the Baltic Sea. ...
All deposits of fossilized fossilized resins are of exogenous origin, that is, are associated with factors of geological processes acting on the Earth's surface and in the upper layers of the lithosphere. ...
Usually chalcedony is most often found in the form of an unattractive dull gray or almost colorless variety, however, there are also colored chalcedony, which is an attractive material for making jewelry. ...
The modern opal market is filled with a variety of stones and products made from them, and prices for these stones can vary more than a thousand times ...
