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wholesale crystal silver rings What is Lantian Jade?

Опубликовано в от Король

The name of Lantian jade was first seen in “Hanshu·Geography”, and the beautiful jade was produced in “Beijing (now Xi’an) North Lantian Mountain”. После, ancient books such as “The Book of the Later Han Dynasty · Biography of the Foreign Relations”, Zhang Heng’s “Xijing Fu”, “Гуан Я”, “Shui Jing Zhu” и “Yuanhe Prefectures and Counties” and other ancient books have recorded the production of jade in Lantian. During the Wanli period of the Ming Dynasty, Song Yingxing stated in Tiangong Kaiwu: “The so-called Lantian is an alias for jade from Congling (Kunlun Mountain), and then he mistakenly thought that Lantian was the Lantian of Xi’an.”

В последние годы, geologists in Shaanxi have discovered serpentinized marble jade in Lantian, and believe that it is the Lantian jade recorded in ancient times. This discovery not only attracted the attention of the geological community, but also aroused the interest of archaeologists. Although this kind of jade is not very beautiful, because Lantian is located near the ancient city of Xi’an, with a Mohs hardness of about 4, it is easy to process, so the ancients are likely to use it as an ornament. Among the jade articles of the Han Dynasty, there are two pieces that resemble today’s Lantian jade: one is a large jade shop head unearthed near the Mao Tomb of Emperor Wu of the Han Dynasty in Shaanxi, and the other is a Han Dynasty jade pendant from the Palace Museum. Many scholars believe that the quality and color of these two jade articles are very similar to the Lantian jade discovered in recent years. Однако, whether they are really the “lantian jade” that the Dai referred to requires further investigation.

Lantian jade is a serpentinized marble, carbonate mineral, the main mineral components are calcite and serpentine, and a small amount of dolomite, chlorite, тремолит, слюда, talc and other minerals. Varying granular metamorphic structure, block structure. The colors of Lantian jade are white, желтый, beige, and apple green. Glass luster, жирный блеск или восковой блеск, от слегка прозрачного до полупрозрачного, the refractive index is 1. 50 ~ 1. 60, and the range is wide. The Mohs hardness is 3-4, and it foams when it meets hydrochloric acid.

High-quality Lantian jade requires bright color, сильный блеск, высокая прозрачность, тонкая текстура, uniform distribution of serpentine minerals, и никаких трещин и других дефектов.

High-quality Lantian jade is often made into jewelry jade and sold.

 

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