The modern mining lantian jade mine is located in Hongmensi Village, Yuchuan Town, Lantian County. The ore-bearing strata are Archean biotite schist and amphibole gneiss. Jade is fine-grained marble, mainly composed of calcite.
There are records of beautiful jade produced in Lantian in ancient books, and there are records of beautiful jade produced in Lantian in ancient books and documents such as Biography of consorts in the Later Han Dynasty, Fu on Xijing, Guangya, Notes on Water Mirror and Yuanhe County Records.
Lantian jade is one of the four famous jade in China.
The four famous jade in China refer to Hetian jade in Xinjiang, lantian jade in Xi of Shaanxi, dushan jade in Nanyang of Henan and Xiuyan in Liaoning.
1. Hetian jade is translucent, oily after polishing, and its hardness is between 5.5 and 6.5 degrees.
2. lantian jade is one of the earliest jade species developed and utilized in China. It has a history of more than 5,000 years and was developed and utilized as early as the Neolithic Age.
Lantian jade belongs to serpentine diopside. X-ray diffraction analysis shows that minerals are mainly composed of serpentine marble, tremolite, olivine, turquoise, diabase and brucite.
Lantian jade is white, beige, yellow-green, apple green, green-white and other colors, with glass luster, greasy luster and slightly transparent to translucent. It is blocky, banded and spotted, with dense, delicate and tough texture. Mohs hardness is 2-6 degrees and density is about 2.7 g/cm3.
Lantian jade stone deposit is located in the marble belt of Mesoproterozoic Kuanping rock group, which was formed by regional metamorphism-contact metasomatism interaction.
3. dushan jade, also known as "Nanyang Jade" or "Henan Jade", is produced in Dushan in the north of Nanyang City. There are also "monologues" for short
4. Jade is produced in Xiuyan, Liaoning, China, and is named after it is mainly produced in Xiuyan, Liaoning. Jade is a kind of nephrite and belongs to serpentine.
Baidu Encyclopedia-lantian jade