quartz de gangue
81Silver mining in the United States — began on a major scale with the discovery of the Comstock Lode in Nevada in 1858. The industry suffered greatly from the demonetization of silver in 1873 by the Crime of 73, but silver mining continues today.The United States produced 1,200… …
82Silver mining in Nevada — Silver mining in Nevada, a state of the United States, began in 1858 with the discovery of the Comstock Lode, the first major silver mining district in the United States. Nevada calls itself The silver state . In 2006, Nevada was the nation s… …
83Uranium mining in Utah — Uranium mining in Utah, a state of the United States, has a history going back more than 100 years. Uranium started as a byproduct of vanadium mining about 1900, became a byproduct of radium mining about 1910, then back to a byproduct of vanadium …
84Broken Hill Ore Deposit — The Broken Hill Ore Deposit is located underneath Broken Hill in western New South Wales, Australia, and is the namesake for the town. It is arguably the world s richest and largest zinc lead ore deposit. Discovery The Broken Hill ore deposit was …
85!6! — Or Pour les articles homonymes, voir Or (homonymie). Or …
867440-57-5 — Or Pour les articles homonymes, voir Or (homonymie). Or …
87Ankérite — Catégorie V : carbonates et nitrates[1] Ankérite sur quartz Huaron Pérou …
88Aurifère — Or Pour les articles homonymes, voir Or (homonymie). Or …
89Aurum — Or Pour les articles homonymes, voir Or (homonymie). Or …
90Barytine — Catégorie VII : sulfates, sélénates tellurates, chromates, molybdates, tungstates[1] Barytine Frizington, Angleterre (5,4×4,6 cm) …
