This is how the color of emerald comes from

Jade has a very wide variety of colors. There are several kinds of green alone, not to mention other colors. So how are these rich colors formed?

Jade is mainly composed of jadeite or jadeite and sodium (sodium chrome pyroxene) and sodium calcium pyroxene (diopside). Some jade also contains minerals such as amphibole, feldspar, chromite, limonite, etc. Therefore, the color of jade will be different depending on the mineral elements it contains. Jade has many coloring ions, and different colors are composed of different coloring ions.

White (colorless)

Pure jadeite jade is white, contains sodium aluminum silicate, and does not contain pigment ions, so its raw stone appears white or nearly colorless. The output of white jade is large, but most of it is not very valuable. However, the price of jadeite of glutinous ice grade and above is very high, especially the colorless jadeite of glass grade, which is very expensive. Although this kind of jade is almost colorless, it has a delicate texture and is as transparent as water. With its luster, it gives people a feeling of extraordinary elegance. It is also a collection-level jade that is one in a million.

green

Green is a common color in jadeite, which is mainly the result of chromium (Cr3+) ions replacing aluminum ions (Al3+) in jadeite minerals. The content of Cr and Fe will directly affect the depth of green. The higher the chromium (Cr3+) ion content, the deeper the green of the jadeite. If it contains too much chromium, it will easily form dry green jadeite.

Purple

Purple jade, also known as violet jade, is called "spring" by people in the industry. The purple color of emerald is caused by the electron transition between Fe2+ (divalent iron) and Fe3+ (trivalent iron).

black

Black jade is a relatively rare variety of jade. This color is believed to have a strong effect in warding off evil and eliminating disasters, and is often used as a protective ornament. The black color of jadeite is generally divided into two types. One reason is that there is too much chromium in the jadeite mineral, until the composition becomes omphacite, forming omphacite jadeite. When exposed to strong light, the stone appears green. The other is that black jade is formed because the jadeite mine contains a large amount of silky black minerals. This color is secondary and does not show green when exposed to light, and is also called black chicken.

Red, yellow

The red and yellow colors in jade are called jadeite. Different from green and purple jade, red and yellow are secondary colors formed when jade is exposed to the surface after mineralization and is infiltrated by iron elements. The purer the color, the higher the value. If a little bit of iron metal element is mixed into the jade, it will be infiltrated by limonite to form "yellow fog", distributed in the form of dots, clusters and flakes, staggered and orderly, and is known as sprinkled gold.

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