How to judge the luster of jadeite?

Jade is a jade stone with a polycrystalline interwoven structure. Simply put, it is a collection of countless translucent mirrors with their own reflective properties. The "mirrors" of jade not only reflect each other, but also shoot at each other. These optical reactions constitute what we often call the gloss of jade.

Generally speaking, a finished jade product with a thickness of about one centimeter and a round shape will have the visual effects of fluorescent light, oily light, rigid light, glass light, waxy light, and stone light. Correspondingly, it can also divide the quality, water quality, and transparency of the jade crystal from the side.

In the jargon of the jade industry, the best quality light performances are fluorescent light, oily light and rigid light, followed by glass light and then waxy light. The worse performance is stone light.

The fluorescence in jade is actually a normal optical phenomenon. The micro-crystals inside the jade are arranged neatly and orderly, causing the overall refractive index to become more obvious after light enters the jade. Jade with fluorescent feeling can give people the feeling that the jade is brighter than its surroundings at any angle. Theoretically speaking, any jadeite of the glutinous grade or above may exhibit fluorescence, and the closer the shape of the jadeite is to a perfect circle, the more obvious the fluorescence effect will be. This is also one of the reasons why carvers try to make spherical objects and figures as round as possible in finished jade products.

Oily sheen means that visually, we can see that the jade seems to have been brushed with oil. This requires the jade crystals to be quite fine. When light enters jade, the same beam of light is decomposed into many rays of uniform size that gradually diffuse. They are evenly distributed on the surface of jade crystals, ensuring the transparency of the jade while also reflecting the shape of the light when it shines on a single crystal.

Rigid light represents the extraordinary transparency and reflective ability of jadeite crystals. In the jade market, we often hear the terms "full of hardness, having a strong flavor, and having hardness", which refer to this ability.

Vitreous luster is a light characteristic possessed by most jade products. Jadeite with a glassy luster usually has crystals of average quality and a relatively tight arrangement. A noticeable glassy luster is more likely to appear on jade products of younger quality. This kind of jade is not very eye-catching and is just ordinary, but it has good gloss and is reasonably priced.

As for the waxy luster and stone luster, they usually appear on inferior jadeite. The main problem with jadeite of poor quality is that the crystals are loose, the quality is tender, and the light transmission effect is poor. No matter how good the water head of the jadeite is, it will have a loose visual effect. This is wax light.

Stone luster, as the name suggests, means that jade is like stone and its luster is not strong. After polishing, jadeite with this kind of glossiness will hardly have the transparency of other types of jadeite. It lacks spirituality and looks like a piece of stone.

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