how can i diffrentiate between spessatite garnet and hesonitegarnet in a mine?
400219
Well, it won't be easy.  The two differ only in one way: Spessatite has Mn, while Hessonite (which is a subtype of grossular) has Ca.  The colours are also similar: Spessatite is ususally deep red but may also be black to orange, dark pink, or brown.  Grossular/Hessonite is more likely to be nearly colourless to green, yellow, pink, or brown.\n\nThe best way to tell them apart may be by the assemblage in which they occur.  Hessonite tends to be more commonly associated with skarns and other metamorphosed carbonate-bearing rocks, and is usually associated with calcite, dolomite, wollastonite, tremolite, and epidote.  Spessatite on the other hand tends to more commonly occur in granites, pegmatites, and other felsic igneous rocks, and in Mn-rich metamorphic rocks.\n\nThe only sure way to tell though would be to put them on a microprobe to find out.\n\nGood luck!
812205
Put a metal which has higher activity than Silver
695150
This past summer the wife and I took a trip to NC. Spruce Pine to be precise. We went "Rock Hounding" or "Gem Mining" at place called  Gem Mountain.\n\nhttp://www.gemmountain.com/aquamarine.htm\n\nWhile at Gem Mountain we purchased one bucket of minerals and mined at their Aquamarine mine near by.\n\nWe found some nice specimens, but one in particular stuck a nerve, The image of this Aquamarine is posted at my site, Take a look:\n\nhttp://my.opera.com/TheMineralExchange/albums/showpic.dml?album=157930&picture=2347315\n\nOk.. so after viewing the image, Aquamarine's stats are as follows:\nA) : Green-blue\nB) : White\nC) : 2.63-2.91\nD) : 7 1/2-8\nE) : Hexagonal\nF) : Imperfect\nG) : Conchoidal, Uneven, Brittle.\n\nHey Teacher?. did I pass?
1174504
Go to your local Ministry of Mines and Energy (government), they have plenty of ore samples and such lying around.
242517
Granite hornblende is a source of silicon.\nAs a start, have a look here:
934247
A couple of reasons... Gold atoms are heavier than either the iron or sulfur atoms that make up pyrite.  Also when the iron and sulfur atoms bond in pyrite they form a lattice or patterned arrangement.  This leaves room for lots or air in between the atoms.  Gold bonds to other gold atoms in a very close arrangement, as close as possible, leaving little space for air.
949319
Both of these will reduce the size of the ore, and both are used.  I think that they use crushing first.
546325
Magnetite or AKA 'lodestone' - an iron containing mineral that is slightly magnetic. The orientation of the iron in the mineral is lined up much like we think of normal man-made magnets. This allows it to be attracted to earth's magnetic field.
464160
Chrysotile, or white asbestos, CAS No. 12001-29-5, is obtained from Canadian serpentine rocks.\n\n    * Amosite, CAS No. 12172-73-5, also known as Grunerite or brown asbestos, is an amphibole from Africa, named as an acronym from Asbestos Mines of South Africa. One formula given for Amosite is Fe7Si8O22(OH)2.\n\n\nCrocidolite, or blue asbestos, CAS No. 12001-28-4, is an amphibole from Africa and Australia. It is the fibrous form of riebeckite. Blue asbestos is commonly thought of as the most dangerous type of asbestos (see above and below). One formula given for Crocidolite is Na2Fe2+3Fe3+2Si8O22(OH)2.\n\nNotes: Serpentine rocks are those with curled fibres. Amphiboles have straight, needle-like fibres.\n\nThe amphiboles, in their fibrous form, are friable and therefore the most carcinogenic, although they also exist in safer non-fibrous forms. Asbestos with particularly fine fibers is also referred to as "amianthus".\n\nOther asbestos minerals, such as tremolite, CAS No. 77536-68-6, Ca2Mg5Si8O22(OH)2; actinolite (or smaragdite), CAS No. 77536-66-4, Ca2(Mg, Fe)5Si8O22(OH)2; and anthophyllite, CAS No. 77536-67-5, (Mg, Fe)7Si8O22(OH)2; are less-used industrially but can still be found in a variety of construction materials and insulations and occur in a few consumer products, such as talcum powders and vermiculite. In the United States, the Environmental Protection Agency (EPA) has banned all construction-related products that have asbestos content of 1% or greater. It has also banned asbestos in all other friable (easily crushed by finger pressure) products.
621837
neither granite nor obisdian are minerals they are two different types of igneous rocks. basically molten granite cools slow generating large crystals, obsidian cools very fast giving it a glassy look and making it nearly impossible to pick out individual crystals
360652
Hematite is cut and polished just like any other rock/ore. I'm unsure how to go about removing marks from it though.
519971
depends on the mineral
958993
Like diamonds and garnets, spinel belongs to the isometric or cubic crystal system.  The typical crystal habit of spinels is octahedral - which looks like two 4-sided pyramids placed base to base.  It is also commonly found twinned, and may be found as rhombic dodecahedrons.
98476
Piece of cake.  What's the mine dimensions?  How much money do you have to spend?
812692
Ferric sulfite, or iron (III) sulfite
77125
There is an explanation for many mines in Canada at this website: http://www.mining-technology.com/projects/#North_America\n\nAn example from the Campbell Gold Mine in Ontario:\nThe run-of-mine ore is crushed in the mine and lifted out, re-crushed to less than 10 mm size and ground by a rod mill, ball mill, and cyclone mill series. They then use a gravity separation using Knelson concentrators. Shaking tables then separate much of the sulphides from free gold, and then a flotation process is used before autoclaving. The resulting solids are treated to convert sulphides and arsenic. It is then neutralized with lime and leached in an eight stage cyanide process. Finally a zinc precipitation sytem is used to recover the gold and it is refined on site. There are more details on the website.
732207
Pure crystals of garnet are used as gemstones. Garnet sand is a good abrasive, and a common replacement for silica sand in sand blasting. Mixed with very high pressure water, garnet is used to cut steel and other materials in water jets.