open 10 am - 7 pm
laboratory is closed
What tools are used by gemologists?
When a Gemological study of stones and other jewelry gemologists use a wide range of equipment:
- Refractometer – used to determine the coefficient of refraction of a mineral or jewelry insertion by the effect of light refraction.
- Time domain reflectometer – used for determining the reflection coefficient or the averaged value of the refractive index of the mineral or jewelry insertion through light reflection effect.
- Scales – are used to determine the product weight, of stones, inserts, and also for determining the specific gravity of stones, inserts, materials, jewelry.
- Magnifier – used for preliminary examination of minerals, jewelry inserts, jewelry, cutting and polishing raw materials; for the production of quality characteristics of jewelry inserts, jewelry, cutting and polishing raw materials; measuring magnifiers are used to estimate linear dimensions and proportions of jewelry.
Microscope is used for detailed examination of minerals, jewelry inserts, jewelry, cutting and polishing of raw materials (including advanced diagnostics); for photofixation of defects or characteristic feature; as a means of arbitration view in the formulation of qualitative characteristics.
- A polariscope is used to determine the anisotropy of minerals or jewelry inserts, can be used to determine the degree of dichroism.
- Monoskop – is used to determine asnosti anisotropic material the jewelry inserts.
- Dichroscope – used to determine dichroism and its extent in the material of the jewelry inserts.
- UV lamp – used to identify the effect of luminescence of the material of the jewelry insert in the ultraviolet and qualitative and/or diagnostic definitions based on it.
Endoscope – used to examine internal structures drilled pearls.
- Measuring device (e.g. measuring linear dimensions "Leveridge", "Presidium", calipers, and other) is used to determine the linear dimensions of the jewelry inserts and jewelry.
- Proportionsof – used to determine a metric (linear and angular) characteristics of jewelry and estimates of proportions.
- Gemological lamp standard lighting – used to create a standard illumination of the workplace gemologist.
- Additional means of illumination are used to create the required specific types of lighting (polarized light, monochromatic light, point lights) used in the diagnosis or assessment of jewelry.
Equipment, establishing special conditions for color evaluation of diamonds (GIA Gem Instruments DiamondDock, GIA Gem Instruments Diamond Lite, Spectrowave™ Diamond Grading Cabinet, and others)
- Sets standards for color and color atlases are used for determining color characteristics of diamonds, colored jewelry inserts (stones and pearls).
- Sets standards for the characteristics of purity are used to characterize the purity of the diamonds and other jewelry.
- The spectroscope – used to Express determination of the main spectral lines (absorption and fluorescent light) in the materials of jewelry.
Express-analyzer of the thermal conductivity of minerals (e.g. Gem tester, Diamond tester Moissanite-tester and others) – used to determine the comparative thermal conductivity of materials of jewelry.
Express-analyzer electrical conductivity (for example: Gold Tester Mizar™ Liquid Style Tester, GemOro® AuRACLE AGT Gold and Platinum Tester, the Indicator of the sample of gold "Clio-gold" and others) – used for assay (content of precious metal) jewellery alloy.
Express-analyzer of the spectral properties of minerals (example: HRD D-screen™, DiamondSure™, DiamondPLus™, SSEF IIa Diamond Illuminator™, Synthetic ruby identifier, etc.).
- Spectral analyzers (Raman-, Infrared-, Ultraviolet, and visible spectrum, x-ray fluorescence, Magnetic resonance, Catode fluorescent and others) are used for determining the composition, optical and electromagnetic properties of jewelry materials, allowing to identify the material, its processing, the origin, the localization of the place of origin.
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 ...
In practice, in the trade of marine cultured pearls produced by mollusks of the species Pinctada maxima and Pinctada margaritifera, as a rule, they adhere to a system of 4 gradations: "A" ("D"), "AA" ("C"), "AAA" ( "A / B"), "AAAA" ("A"). ...
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. ...
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. ...
