First, Nanyang Valley
Nanyang jade is produced in Dushan, 8 kilometers north of Nanyang, Henan, so it is also called dushan jade. It is different from jadeite and nephrite, and they are composed of only one mineral element. It is an altered gabbro, which mainly contains calcium silicate and aluminum silicate, and contains many mineral elements. Nanyangyu has a hardness of 6-6.5 and a specific gravity of 3.29. Its hardness is almost equal to that of jadeite, so some geologists abroad call it "Nanyang jadeite".
Second, the secret jade
Xinmi city, Henan Province is a famous producer of dense jade in China. Mi language was developed and utilized in ancient times, and it was mostly used to make cigarette holders, bracelets and other small pieces.
Third, Xixia jade
Xixia quartzite jade (hereinafter referred to as "Xixia jade") is an altered ultrabasic rock, mainly distributed in Xixia County, Henan Province. Xixia jade was discovered in the 1960s, but it was not mined until the 1970s. At present, the annual output has reached tens of thousands of tons, mainly sold to Beijing, Guangdong, Henan, Liaoning and other places.
Extended data
Mineral value of Henan jade;
Henan jade and Dongling stone are both green quartzite jade. Henan jade is fine in texture and even in color. Henan jade is produced in gray-white fine-grained quartzite of Sinian Maanshan Formation in Mi County, with intermittent vein distribution. The vein is generally narrow (20-30cm), and the widest can reach about1m.. The annual output is about 250,000 kilograms.
Yuxian jade deposit is located in quartzite of Sinian Maanshan Formation, and the ore body is controlled by strata, lithology and structural fractures. The ore-bearing strata are stable and the scale of the deposit is large. According to the occurrence of ore body and the fabric characteristics of ore minerals, it is considered to be a late hydrothermal fissure metasomatic deposit. The jade in Mixian County has excellent quality, good technological performance, soft color tone and delicate texture. The jade products processed are exquisite, simple and elegant, and antique. Therefore, the jade mine in Mi County has great development prospects.
Baidu encyclopedia-Henan jade
Baidu encyclopedia-Nanyang language
Baidu Encyclopedia-Miyu
People's Network-Collect Hetian jade, don't let Xixia jade make up the number.