Nano crystal Emerald is a name for a group of new materials for jewelry.
The crystals grown in amorphous substance by high-temperature synthesis at 1500-1750°C.
The chemical composition of these materials is a mixture of oxides including silica, zirconia, alumina, zinc, lithium and magnesium oxides. Nano sized crystals are homogeneously distributed in amorphous matrix.
As a result materials with various physical-chemical properties based on spinel, gahnite, sapphirine and other crystals are formed.
Hardness of the suggested materials is 6.5-7 by Mohs scale,
Refractive index is 1.5-1.7,
Density is 2.7-3.2 g/cm3.
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