mines geology minarals glass industry
210329
Gemstone quality crystals can be made into jewellery and so are vauable. Others are useful for their ores (hematite Fe2O3 iron ore, malachite copper ore etc.) I also heard somehing about using crystals for resonance but I'm not sure what that means lol hope this helps\n\nP.S. Quartz ie. silicon used for glass
605983
Here is a map of US mining and mineral production:\nhttp://minerals.usgs.gov/minerals/pubs/mapdata/\n\nHere is a USGS Geographic Information System that allows you to see the location of mineral resources around the world. Go to \nhttp://tin.er.usgs.gov/mrds/\nThen click on "Browse World" on the left side. This will open and interactive map. You can turn on the data layers and refresh the map on the right hand side of the map and you can zoom in to see the data better using the icons across the top. \n\nIf you use the icon with the i in the center you can click on the small triangles on the map and you will get a location and type of mineral resource displayed at the bottom of the page. You can also build queries, and after you have made a map that you want to keep, you can print it. \n\nOther than that you can go to the Perry-Castaneda library site, where they have thematic maps of most countries, including maps and links for mineral resources. I only found one world-wide map there for mineral resources. \nhttp://www.lib.utexas.edu/maps/thematic.html\n\nIf you are looking for minerals other than economic resources, you can go to mindat.org. At that site you can search for specific minerals of all kinds, and locations are listed. \nhttp://www.mindat.org/index.php\n\nNational Geographic has a GIS that shows either coal fields or surface geology. \nhttp://plasma.nationalgeographic.com/mapmachine/
601840
It looks to be PA. See the link below, and look under category 212 (mining excluding oil & gas). Further on in the same table, the data is broken out into more detail.\n\nSomething like the USGS probabaly has info on mineral deposits.
526571
I think that (1) would be crystalline structures, (2) is igneous (3) Certain schists have been derived from fine-grained igneous rocks such as basalts and tuffs.
530524
Just a guess: Because of all the coal around this area, I would suppose that sulfide minerals, especially pyrite (iron sulfide) would be common. Some sphalerite (Zn, Fe sulfide) has been found in Lucerne county. Some rozenite (hydrated Fe sulfate) has been reported from Jeddo Highland coal mine in Hazleton.\n\n"Sulfide minerals typically occur in coal beds as well as in strata overlying and underlying the coal. Weathering and aqueous dissolution of the sulfide mineral oxidation products, including dissociated sulfuric acid and metals (e.g., Fe, Mn, Al), produces surface and groundwater degradation." \nwww.epa.gov/waterscience/ guide/coal/support/support2.pdf\n\n"By far the most serious environmental problem caused by abandoned mines is polluted water. It happens when rain comes into contact with a surface or underground mine and interacts with the mineral pyrite, better known as fools' gold, to form sulfuric acid. The toxic brew discharges into streams and rivers, choking off plants and wildlife and coating streambeds with iron hydroxide, tinting water yellow, red or orange. Aluminum, manganese and other metals also leach into the water.\nOld mining operations have polluted about 4,000 miles, or 5 percent, of the rivers and streams in Pennsylvania, officials estimate. The west branch of the mighty Susquehanna River is dead for its upper 70 miles; 1,000 miles of its tributaries are likewise lifeless. The Jeddo Tunnel, an engineering marvel drilled through miles of solid rock to drain deep mines in the Hazleton area, discharges 40,000 gallons of polluted water a minute into the Little Nescopeck Creek -- the largest such discharge in a state full of them."\nhttp://www.theminingnews.org/news.cfm?newsID=951
189686
They do indeed contain valuable minerals, some much more valuable than gold.  To set up any kind of large-scale mining operation would cost trillions of dollars using modern technologies, though.  So I don't think it would be worth the cost.  In 100 years, we may very well have off-world mining operations, depending on what technologies develop.
415070
1) Rhyolites that cool too quickly to grow crystals form a natural glass or vitrophyre, also called obsidian\n\n2) amount of silica di-oxide, texture and color\n\n3) gold is found in quartz veins around igneous intrusion via hydrothermal fluid precipitation\n\n4) If we assume a slower but constant rate of cooling, then both minerals could feasibly form well shaped crystals at the same time (phaneritic texture) .  If we assume a slow than fast cooling, then possibly only plagioclase would form (porphyritic texture) due to its position in Bowen's reaction series.
590795
Founded in 1808 as a lead mining town, discovery of mine edges in the limestone "as to resemble seats in the amphitheater of the ancient Herculaneum"buried in the eruption of Mt. Vesuviu in Sicily. Founder Moses Austin (1761-1821).
176633
I am not really sure b/c of insufficient information.\n\nWhen you said silvery I thought of the mineral galena but it is too soft to cut glass.\n\nThen I thought about Hematite. It has a hardness of about 6 to 6.5 which is definitely harder than glass (5.5). Hematite is also found in sedimentary rocks which would make sense with what you described.\n\nHematite is not really heavy (not like galena which contains lead) but it is heavier than most rocks/minerals.\n\nHowever, I have problems with not being able to break hematite w/ a sledgehammer. It looks like it would give at some point.\n\nTo see for yourself what some forms of hematite look like go to the links below. Hematite is interesting in that it takes on many different forms/habits.\n\n:)
647206
on the island of cyprus, where some of the oldest copper mines in the world are, there are pits where the people bult large fires and threw the malachite in. when the fire died and cooled, semi pure copper was at the bottom. frome there refining copper was born
359670
Consult the Bureau of Indian Standards or the PHD Chamber of Commerce and Industry. . The Delhi Gold Merchants Association will also have the list.
99979
Yes, most commercial glass is made using the float glass process and the glass is floated on molten metal.\n\nItems such as telescope mirrors are ground and polished to fit a specific curve based on the science of optics.
628315
Glass is made from sand (its the silica in the sand).  Solar Cells *i think* are also made of silica.  So, if your country has a lot of sand (desert or beaches) that would be a start.\n\nGold occurs where gold occurs.  Its either there or it isn't; the past geologic events would have had to do something to cause gold to be deposited in an area.  The only way to find out is to look.\n\nAlso, areas in & around volcanoes can be sources of many natural resources that are found deep in the earth but are brought to the surface as a result of the volcanic activity.
461159
the first could be either Flourite (4), Apatite (5) or Orthoclase (6).  The second could be either Topaz (8) or Corundum (9).
406995
Try Wikipedia, or perhaps your local library has a general Geology book that you can reference
19822
heres a sweet little find in franklin n.j. they have stone that glows foresent when exposed to blacklight
438609
G'day Green day luva 91,\n\nThank you for your question.\n\nGeoscience Australia has a number of maps of Australia showing mineral resources.The South Australian Department of Primary Industries and Resources has maps available but for a fee.\n\nI have attached sources for your reference.\n\nRegards