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.
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The color of the jadeite dyeing, immersion, coloring and filling coloring is concentrated in the cracks and crystal gaps, and it is easy to observe in the distribution of the transmitted light dark field. The coated jade is generally transparent with green outside the colorless jadeite. The outer coating of the colloidal film is also called jade in the market. The color of the jade that has just been prepared is 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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