How to identify C-grade jadeite whose color cannot be changed but quality?

If you want to identify C-grade jadeite, you must first understand the concept and characteristics of C-grade jadeite. The biggest characteristic of C-grade jadeite is "discoloration". The dyed jadeite has poor durability. When exposed to ultraviolet rays, high temperatures or contact with chemical liquids, the dye will change or be dissolved. Then we can start from the characteristics of C-grade jadeite. Let’s take a look at how to identify C-grade jadeite.

How to Identify C-Grade Jadeite (Part 1)

1. At first glance, the colors seem exaggerated, irregular, and unnatural.

2. Observe under transmitted light, or under a magnifying glass or microscope, and you will find that the color is not distributed inside the jadeite crystal, but is attached to the surface of the jadeite mineral, or accumulated, or attached to the micro-gaps of the jadeite, often in a network or clumpy distribution, without color roots (Related reading: What are color roots). It will be clearer if it is soaked in water or immersed in oil (oil with a refractive index of 1.66 is better) for observation.

3. The color of C-grade jadeite is darker on the surface, and becomes lighter as it goes deeper inward. The color also obviously deepens or accumulates in the cracks or rough areas of the jade piece.

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