Natural jadeite, which has been carved and polished without any chemical treatment, artificially forged at high temperature and high pressure, is a natural color, and is called "positive color" or "true color" without dyeing or electrochromism.
2. Gan Qing
Gan Qing, as its name implies, refers to an almost green jade, which can be seen in the market. Its green concentration is large, that is, it is dark, yellow-green, dark green to dark green, with black spots, some evenly distributed, some shades, and often some black spots.
3. Tie Longsheng
The Longken mining area in Myanmar was first excavated by Burmese villagers in Longken in the early 1990s. The whole 25 mine holes are coiled into strips like dragons, and the locals shout "the birth of Tianlong", which is the origin of "the birth of Tianlong" emerald.
Extended data
1. Most of the high-quality jadeites in the jewelry market come from the Quaternary and Tertiary conglomerate layered jadeite deposits in the Ulu River Valley, Myanmar. They are mainly distributed in the mountainous areas of northern Myanmar, with a length of about 240 km from north to south and a width of 170 km from east to west. 187 1 year, primary jadeite ore was discovered in Lu Wu (also known as Wu Jia, Wulong and Lu Wu) basin, Myanmar.
2. Gan Qing is different from jade. First of all, it is mainly composed of sodalite and a small amount of hornblende minerals such as jadeite and chromite.
So its physical properties are also different. Its hardness is 5.5 ~ 6, its specific gravity is about 3.40 and its refractive index is about 1.74. Due to the different proportions of various mineral combinations, their physical properties have also changed.
3. Tielongsheng, from the gemological point of view, the main mineral component of Tielongsheng is sodium chrome pyroxene. English name ureyite clinopyroxene mineral gem.
The chemical formula is nacrsi2o6. This mineral is a rare gem in nature, which was first found in lunar minerals. Later, it was found in jadeite rocks in Myanmar.
Baidu encyclopedia-natural emerald
Baidu Encyclopedia-Gan Qing
Baidu encyclopedia-tie Longsheng