Commonly known as "old pit glass species" in business circles, it usually has glass luster, delicate and pure texture, pure, bright and rich color, and even emerald green; The jadeite jade in the old pit is very fine, and it is extremely difficult for the naked eye to see "emerald"; Laokeng jadeite is translucent to transparent under the irradiation of light, which is the top grade or the best of jadeite.

2. Water species of jadeite

The jade structure of water jadeite is slightly thicker than that of old pit glass, and its luster and transparency are slightly lower than that of old pit glass, but it is similar or equivalent to ice. Microscopically, its internal structure presents a little ripple, or a little dark crack and stone grain. Emerald jade and jade jewelry are the source of jewelry in Lan Yu, and occasionally there are very few impurities and cotton willow. Some experts say that water jadeite is a kind of old pit jadeite with light color or colorless and slightly poor quality, and it is an upper-middle grade jadeite variety.

3. Violet jade

This is a kind of purple jade, the color is like violet flower, and violet is also called "Toona sinensis" or "spring" in jewelry industry. Emeralds in spring have high, medium and low grades. It is not necessarily valuable as long as it is purple, but it must be comprehensively evaluated in combination with quality indicators such as texture, transparency and craftsmanship. The purple on jadeite is generally not deep. According to the different shades of purple, the jadeite industry divides the purple in jadeite into pink purple, eggplant purple and blue purple. Pink purple is usually fine in texture and good in transparency, followed by eggplant purple and blue purple again.

4. Kethleen

The texture is similar to that of the old cellar species, colorless or less colored. The characteristics of ice species are that the outer surface has a good luster, translucent to transparent, clear as ice, giving people the feeling of ice and jade. If there is a flocculent or intermittent blue color in ice jadeite, it is called "blue flower ice", which is a common variety in ice jadeite. The ice species is middle or high grade or middle grade jadeite.