Digging for gold and other precious metals
Por um escritor misterioso
Descrição
Where do the metals we use come from and what determines where we get them from? Dr Julie Robson focuses on the highly sought-after metal of gold, which actually occurs with other metals including silver, copper and lead.
Environmental Impacts of Gold Mining - Earthworks
How to profit from low-grade gold mines
Gold: Facts, history and uses of the most malleable chemical element
Gold's ugly impact on the climate » Yale Climate Connections
Gold: History of Use, Mining, Prospecting, Assay & Production
How much gold is hiding underground in northern Minnesota?
Selling Your Gold? Think Outside the (Jewelry) Box
What is Recycled Metal? – Jenni Stuart Fine Jewelry
Quality Control and Assessment in Gold Mining: Ensuring Precious Metal Purity
Launching Gold & Silver Mining Ideas: Long-Term Picks From Precious Metals Mining Space
Environmental Impacts of Gold Mining
de
por adulto (o preço varia de acordo com o tamanho do grupo)
