How to judge the quality of natural jadeite? How to select and identify the quality of black jadeite?

Just like other jades, black jade has different types, water content, and color. However, under normal light, black jade looks black. So how should we distinguish the quality of black jade? Next, I will introduce to you how to judge the quality of natural black jadeite and how to select and identify the quality of black jadeite.

How to judge the quality of natural black jadeite

1. Color

Under natural light, the overall appearance of black jadeite should be pure black, but when observed through light, the overall appearance should be green. When using strong light to project jadeite, the greener the better, and it should be even.

2. Net

Clean refers to the degree of clarity. Although the appearance of black jadeite is black, there should be few impurities inside. Under strong light, the higher the light transmittance of black jadeite, the better, and the fewer impurities such as black spots and white cotton, the better.

3. Gang

Good black jadeite will show a very strong luster after polishing. Therefore, it depends on whether the polished surface of the jadeite has strong reflection. The stronger the reflection, the higher the hardness and the better the density.

4. Hidden

It seems that the carving master uses changes in texture to create more sense of layers, but some frosted jadeite will hide many impurities and white cotton in the frosted parts, so careful observation is required.

5. Seed

The so-called species refers to the genetic quality of jadeite. The quality of black jade needs to be seen through light. The smaller and finer the grain size, the better. On the contrary, if the grain size is large, it will be like other types of jade. It will not be fine enough and therefore not precious enough.

6. Work

Jadeite of good texture is usually not carved. The quality of carved black jadeite depends on whether the craftsmanship is delicate enough. Whether the face of the Buddha or Guanyin statue is symmetrical, whether the body is full, and whether the folds are elastic.

When purchasing black jadeite, you must first observe it under natural light to see if the color is black enough and the transparency is sufficient; then look at its internal impurities. Although black jadeite has more internal impurities, the fewer impurities the better; finally, look at the surface of the black jadeite. Good quality jadeite should have an excellent polished surface, good water quality, and a strong glassy luster. Only such black jadeite is excellent and worthy of purchase and collection.

How to select and identify the quality of black jadeite

Look at the color. By observing through reflected light, the color is dark green or pitch black. Look at the transparency and structure. The particles are arranged tightly, the quality is good, and the transparency is high. Look at the appearance of the color. It is evenly black and shiny black. Look at the composition. Sodium aluminum silicate is a component of black jadeite and can transmit light completely, while black jade is not completely translucent.

Because the main mineral component of black jadeite is omphacite, it contains a small amount of minerals such as albite and tremolite. It has a fine structure and is less brittle. Its deep color is caused by excess Cr and Fe. This type of jadeite appears as a deep dark green or dark green under strong light. It has a density slightly higher than ordinary jadeite, a refractive index between 1.67-1.688, and a very strong luster.

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