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2019-12-24gold is a very widely disseminated throughout nature and may be found in any geological formation from the oldest rocks to the deposits that are still being formed, but in common with other metals, it is more likely to be found in the oldest roc...View All
2009-6-28comparison of different extraction methods to determine gold in geological samples p v sunder raju type of sample containing gold content especially on refractory ores sodium cyanide leach results were d v balaram v, determination of gol...View All
Color changes in many districts, acidic mineral solutions have bleached the area rocks to a lighter color this can be an indicator of gold iron staining gossans not all veins produce much quartz gold bearing veins can consist of calcite or mostly sulfid...View All
Gold in its natural mineral form almost always has traces of silver, and may also contain traces of copper and iron a gold nugget is usually 70 to 95 percent gold, and the remainder mostly silver the color of pure gold is bright golden yellow, but the g...View All
2019-12-26gold prospecting has driven people to search the world for gold under bedrocks, inside mountains, and along rivers the gold rush in american history is one perfect example where people traveled all the way to the west coast in search of gold t...View All
Using pictures of rocks is a simple way to help you identify unknown samples read about the three major rock types and characteristics of each by comparing your rock sample with photographic examples, you can identify key characteristics such as how...View All
2019-12-25how to subsample a large bulk sample or soil, ore, or rocks previous next particles of free gold are not pulverized during crushing and grinding but merely have their shape changed therefore, coarse particles of gold in the original sample...View All
2017-6-24ownership of rocks, minerals, and fossils entails complete control of those specimens in the most extensive sense, still subject to applicable laws, however rights of possession of rocks, minerals, or fossils, while legally distinct from ownersh...View All
A new partwork, called precious rocks, gems and minerals, caught my eye at the news agents today on the cover, a small bottle containing pieces of gold leaf the gold in the bottle was mined at spains rio tinto mines, where the roman empire mined a great...View All
2018-2-12these sample came from new mexico but can be found all over in the desert southwest these sample photos were given to us by betty reid martin the top photo is what is considered banded agate there are a lot of different color variations associ...View All
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