The "golden story" you don't know
If there is a metal element that tempts and afflicts humans for thousands of years, provokes war and conquest, spawns empire and currency, and flattens mountains and forests, it must be the gold of the chemical symbol Au. Au's name comes from the "Dawn Goddess" Aurora in Roman mythology. Like this name of praise, gold has always been a rare metal touted in the history of human civilization and has always been regarded as a symbol of luxury. How much do you know about the story of gold? The ancient Incas regarded gold as the "sweat of the sun"; the pharaohs of ancient Egypt insisted on burying in the "fruit of the gods" of gold; the gift of the three doctors of the East mentioned in the Bible Matthew The first is gold, and the Bible Revelation describes the streets of the holy city of Jerusalem made of pure gold... Gold has been given fabulous power in all ages, it is tempting people, but also afflicting people. American economist Peter Bernstein said in the book The Magic of Gold: "No one has ever made it clear whether we have gold or gold to own us." The world has 12 grams of gold per capita When the ore contains natural gold, the gold is trapped in the rock in the form of granules or microscopic particles, usually at the same time as the veins of quartz or sulphide. This is called the vein deposit gold or the vein gold. Natural gold also appears in the form of leaves, granules or nuggets, which are eroded by rocks and eventually form gravel in alluvial deposits, called sand or alluvial gold. The alluvial gold is richer in gold than the surface of the vein deposit, because the gold in the rock and the adjacent minerals are oxidized and then flow into the river to form gold nuggets by means of flowing water. Natural gold usually contains 8% to 10% of silver, and silver with more than 20% is called silver. The higher the silver content, the whiter the color and the lighter the weight. The density of gold is quite high, with 1 cubic meter of gold weighing 19,300 kilograms and 1 cubic meter of lead weighing 11340 kilograms. According to data released by the World Gold Council, the total amount of gold mined in 4,000 years in human history is about 161,000 tons, barely filling two swimming pools (50×21×1.8 meters) that meet the Olympic standards, more than half of which It was dug up in the past 50 years. At present, there are about 70,000 tons of gold available for trading around the world (actual liquidity is about 25,000 tons). If it is measured by 6 billion people worldwide, only 12 grams per capita, the scarcity of gold is obvious. And mining gold has become more and more difficult. At present, whether it is South Africa's 160-kilometer-long gold vein or California-like cherry-sized gold nuggets, it is almost dug out, and the rest of the gold is buried in a remote corner. Remnants of the. Luggage Case,Travel Luggage Case,Trolley Luggage Case,4 Spinner Luggage Case GDMK GROUP WEIHAI SHOES CO., LTD. , https://www.gdmkgroup.com