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Nanosital is an optically transparent polycristalline material that is formed by the crystallization of glass with corresponding chemical composition and has higher physical and chemical properties than the original glass.

Nanosital is one of glass-ceramic materials, which are known for more than 50 years and have a wide range of compositions and applications. RusGems has adapted existing technology to create a material specifically optimized for jewellery. As a result a multi-component high temperature composition on the base of two main oxides – SiO2 and Al2O3 – was obtained. It is well-known that the above-mentioned oxides are key components of most natural gemstones. The rest of nanosital's components are picked to approximate the maximum required optical characteristics as well as density and hardness. Our technology allows us to vary components of composition quite widely. As a result nanosital that is absolutely identical to its natural counterpart can be produced each time.



Nanosital is synthesized at a temperature of 1700 °C. The table above presents its main properties in comparison to well-known materials:

Comparison chart of physical and optical properties

Mohs hardness scale 7 5 - 5.5 8 - 8.5 9
Refractive index 1.65 – 1.7 1.45 - 1.54 2.17 1.76
Specific gravity 3.5 - 4 2.2 - 2.6 5.9 - 6.3 3.99
Dispersion (play of colors) 0.015 0.005 - 0.007 0.060 0.018
Melting point, °C 1700 600 - 700 2800 2050
Treatment problems Can be readily polished on a diamond polishing wheel 3/2 Too soft, difficult to obtain ideal polishing surface without matt appearance Difficult to produce ideal crystals, hard to get rid of tiny scratches Very hard, abrasives wear out quickly
Heat color stability (in lost-wax casting) yes no no yes

Main characteristics of Nanosital

Nanosital's specific gravity index is very close to that of the most valuable gemstones such as topaz, sapphire, ruby and aquamarine.

Nanosital and the optical properties of the most popular color gemstones are almost similar. Nanosital's main feature is its lack of an unnaturally strong lustre, which is typical of cubic zirconia, wherein the play of colors remains attractive.

Nanosital's hardness (7 on Mohs scale) guarantees jewellery durability without the loss of its original look. The Nanosital hardness index (7) is higher than glass (5), but lower than one of the hardest materials – corundum (9).

Its high melting point allows the use of any colored Nanosital in lost-wax casting.

Color and transparency. Its wide color range, full correspondence to natural analogue, perfect optical properties, total transparency, and absence of inner defects makes Nanosital the best, readily available rough jewellery material on the market.


Nanosital is the best imitation of natural color gemstones, with unique aesthetic characteristics. Nanosital represents the finest option in terms of color, luster, hardness, density, and price.
Nanosital production involves melting the initial multi-component charge, followed by a crystallization heating of the semi-finished product. This technological process, as well as the trademark NANOSITAL©, are patented.
Yes, one of nanosital's most important advantages is that it is completely free from hazardous additives. This quality makes nanosital absolutely safe in cutting as well as when wearing it in a ready-made jewelry item.
An endless range of colors, shapes and sizes of nanosital jewelry cut stones can be made upon customer request.
Nanosital is produced at the highest quality standards to such an extent that it is impossible to differentiate it from its natural analogue. As far as the price is concerned, jewelry items with nanosital cut stones are very affordable thanks to advances in technology and the high quality of production.
Clarity and color cleanliness are among the most important characteristics of nanosital. Our technology allows us to adjust the level of transparency, to imitate natural analogues of opals, chrysoprase, chalcedony, and others. We are able to produce opaque, translucent, or semi-transparent forms of nanosital.
Our technology allows the creation of almost any color of nanosital. We are able to imitate original color so accurately that even a gemologist won't see any difference. We can even create fancy colors which are not seen in natural stones, thereby expanding the available color range for jewelry production. Nanosital's color palette currently has more than 100 different colors, and keeps growing in response to our customers' requirements.
Nanosital has the most optimal hardness – 7 on the Mohs scale – making it not so hard and not too soft. This also means that nanosital's hardness is the closest to topaz's, thus all lapidary tools and technologies to treat nanosital are the same as for topaz.
There have not been any registered difficulties so far. Even if you are not a highly experienced jeweler, you should not be afraid to make a mistake, due to nanosital's affordable price.
Nanosital possesses unique temperature stability, as all nanosital properties remain unchanged under heating of more than 800 degrees Celsius. A torch or a furnace can be used for heat treatment, and nanosital can also be used in wax casting technology.
One of the most important characteristics of nanosital is color stability, as nanosital's color is permanent. Natural minerals may fade or tarnish, but nanosital will not.