Emerald is precious in its colorful and bright colors, and it is also the most important parameter for evaluating jade. Therefore, the coloring treatment of jade has appeared on the market very early. The coloring methods generally include: dyeing, immersion, color, full coating, and radiation addition. The market is accustomed to be called C goods jade.
The color of jadeite dyeing, immersion, coloring and filling coloring is concentrated in the cracks and crystal gaps, and it is easy to observe in the form of filaments in the dark field of transmitted light.
It is coated with green transparent colloidal film. It is also called jade in the market. The color of the emerald coating is just uniform, the surface is smooth and clean, and it is deceptive.
However, after the enlargement, the surface has no jadeite characteristics, and it has a waxy luster, and sometimes the unbonded portion between the film and the jade is visible. The refractive index often deviates from 1.66. The coated jade is gradually falling off with time, the surface is scratched, the gloss is dim, and it is easy to identify. Radiation-colored jade color has a uniform surface and is flaky and plaque-like, which is easier to distinguish from natural jade.
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