How should we identify natural A-grade jadeite?

Jadeite is the most precious and valuable jade and is known as the "crown of jade". It is also called the "Treasure of the Orient" by the international jewelry industry because it is deeply loved by people in some Eastern countries and regions. However, with the development of society, there are more and more fake jades, and the methods are becoming more and more sophisticated, making it difficult to guard against. So, how should we identify natural A-grade jadeite?

1. Gloss.

Determine the glossiness. Natural jade has a good luster and is light translucent. When you look at it, it looks like a pool of water, bright and transparent, full of spiritual energy. After being soaked in strong acid and alkali, the structure of jade becomes loose, and before filling, corrosion pits appear on the surface, causing diffuse reflection and weakening the luster. After adding organic fillers such as resin or plastic, jade often has resin luster, waxy luster, or a mixture of glass luster with resin luster and waxy luster.

2. Color.

Determine whether the color is natural. A-grade jadeite will not undergo any dyeing or other processing techniques, and its color is purely natural. The color of natural jade is distributed along the direction of the texture, and gives people the feeling that it is deeply embedded in the jade without giving people a hollow feeling. The transition between the colored part and the non-colored part is natural, with colored roots. Natural Burmese jade will not turn red if observed using a Charles filter. Since the structure of jade is destroyed, the original optical properties are also changed, so the color distribution of "B-grade expanded jade" has no sense of hierarchy. Although the green color of jade treated by this method is still the original color, after being soaked in acidic solution, the base becomes white, the green distribution is more floating, and the original color orientation is also destroyed, which looks very unnatural. Observe the color of jade in a place with light. Most natural jade colors are relatively pure and smooth, usually not mixed with too many colors, and its color distribution is even and the gloss is strong; artificially processed fake jade does not have this feature, so put the jade in a place with light and observe it. If the color is pure, bright and without defects, it can be judged as genuine.

3. Structure.

When jade is soaked and corroded by strong acids and alkalis, some substances are brought in and out, causing dissolution along the mineral crystals on the surface and inside, resulting in internal interconnected cracks. Under transmitted light, the crisscrossing cracks inside can be seen. Under reflected light conditions, the surface dissolution pits or spider-web-like patterns are clearly visible. Effective methods to identify this type of processed jadeite include surface observation and internal observation. Use transmitted light to observe the internal structure of jadeite. The jadeite that has been bleached and filled has a loose structure, blurred boundaries between the grains, broken grains, and discontinuous cleavage. Under the light, the structure of A-grade products is clear, while that of B-grade products is relatively blurry. For colored jadeite, A-grade jadeite has a dense and not loose structure, while B-grade and C-grade jadeite has a scattered structure, giving people a floating feeling.

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