Zhengzhou high tech Zone, China[email protected] 7*24 For you
All of the gold found on earth came from the debris of dead stars. as the earth formed heavy elements such as iron and gold sank toward the planet39s core. if no other event had occurred there would be no gold in the earth39s crust. but around 4 billion years ago earth was bombarded by asteroid impacts. these impacts stirred the deeper layers of the planet and forced some gold into the mantle and.
If you want to learn about our products , please call or write mail consultation.