A study of the distribution of high-grade gemstone and jade deposits in coun-tries of "The Belt and Road"

There are 65 countries in the "The Belt and Road" region. Due to special geological tectonic environment, these coun-tries have produced gemstone and jade deposits, especially senior gemstone and jade deposits. Relevant researchers have conducted some studies of gemstone and jade deposits, but not from the perspective of "The Belt and Road" strategic plan. The authors summa-rized gemstone and jade deposit distribution in "The Belt and Road" region by consulting a lot of relevant data, in the hope of pro-viding gemstone and jade information of "The Belt and Road" region for Chinese enterprises and relevant countries so as to promote economic development. Diamond deposits are distributed in Russia, China and India, especially in Russian Siberian region, and there are two types:the primary deposit and the secondary deposit. Jadeite deposits are distributed in Myanmar, Russia, Kazakhstan and China. The Myanmar jadeite, distributed in Kachin Hpakan-Tawmaw of northern Myanmar, is characterized by high output and good quality, and the output possesses 95% of the world's output; there are two types:the primary deposit and the secondary deposit. Emerald deposits are distributed in Afghanistan, Kazakhstan, Pakistan, India, Russia and China. Russian Ural's emerald is especially fa-mous, with two types:the pneumatolytic hydrothermal deposit and the pegmatite deposit. Nephrite deposits are distributed in China, Russia and South Korea, especially in Xinjiang of China, having two types:the magmatic hydrothermal deposit and the metamorphic hydrothermal deposit. Htian jade of Xinjiang is most famous in the world.