Because the natural jadeite original stone is formed under natural conditions, a secondary mineral, called fog, is formed in the crystal gap between mineral fillers and jadeite minerals. When white fog appears in the original stone, it means that the jade species are old and there are few impurities, while yellow fog means that it is slightly oxidized by iron and generally produces waxy jade. Secondly, the red mist layer indicates that it is seriously eroded by iron, and the jade quality is average, while the black fog layer indicates that the jade species are poor in quality and have many impurities.
Original stone color
Due to different regional customs, the color of Myanmar jadeite original stone is slightly different. In Myanmar, jadeite can be divided into three categories, with a grade of 12. The domestic jewelry industry divides jadeite into more than 30 grades according to its color. Generally speaking, the tones of Burmese jade can be roughly divided into the following six types.
1, white. Basically does not contain other impurity elements.
2, red. Contains the chemical element iron < FC3+ >.
3. green. < Cr > containing more than 2% chromium.
4, black. It contains more than 2% of 〈Cr〉 and Fe < Fe2+ >.
5, yellow. Contains tantalum.
6, purple. Contains elements < iron > chromium, iron, iron and cobalt.