How to Extract Gold from a Circuit Board | Earth Science BBC Earth Science 4:05 5 years ago 1 654 823 Скачать Далее
Where Does Gold Come From? | Colour: The Spectrum of Science | Earth Science BBC Earth Science 3:33 6 years ago 486 463 Скачать Далее
process of making 99.99% pure gold bars to a very satisfactory level. South Korean gold exchange king process 12:51 2 years ago 31 241 726 Скачать Далее
Day 2 Can you find enough Gold to survive? Another Gold Prospector 23:50 18 hours ago 256 Скачать Далее
Newmont Mining Corporation: How Gold is Made Newmont Corporation 15:15 9 years ago 567 913 Скачать Далее
Inside Gold Factory: Making of 99% Pure Gold Bars – Manufacturing process & Production Max Berka 15:48 1 year ago 6 831 235 Скачать Далее
Amazing Pure Gold Manufacturing Process Technology. Perfect Melting & Casting Gold Modern Method StarTech TV 10:17 4 years ago 9 575 534 Скачать Далее
Gold Mining, Gold Milling, & Gold Refining: The Full Process mbmmllc 1:33:53 1 year ago 779 025 Скачать Далее
Step by Step Gold Refining Process- Gold Smith Jack Gold Smith Jack 2:23 6 months ago 4 709 Скачать Далее