1, the variety of jadeite is old and tender, so you should usually look at it with the light on. Take jadeite as an example. Looking at jadeite by light, if jadeite is tender, the particles in the original stone are large, the light cannot sink, and the reflected light is strong. The meat quality of old jadeite is delicate and transparent, and the light can sink.

2. Species refers to the maturity of jadeite, which is the sum of hardness, density, brightness, luster, wear resistance and polishing performance of jadeite. Ginger is old and spicy, and jade is old and good. Looking at jadeite by light, you can judge whether jadeite is old or tender.

3. First of all, a flashlight has two kinds of light, white light is more suitable for observing the finished product, and yellow light is more natural and stable, suitable for observing the original stone. Taking the original stone as an example, the main purpose of looking at the original stone by lighting is to observe the thickness, luster, crystal quality and transparency of the internal crystal of the original stone. So as to judge whether the stone is old or young. Old, fine texture, good polishing effect of finished products, stable internal structure and no discoloration when worn; The seeds are tender, the texture is loose, and the crystal particles are large, which affects the polishing effect of the finished product, and some of them will change color.