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<table cellpadding="3" cellspacing="0" width="100%" class="forumline"> <thead> <caption><table border="0" cellspacing="0" cellpadding="0" width="100%" class="forumheader"> <tr> <td align="left" valign="bottom" width="25"><img src="http://picsrv.fora.pl/AcidTechTiger/images/hdr_left.gif" width="25" height="27" alt="" /></td> <td align="center" class="forumheader-mid">Topic review</td> <td align="right" valign="bottom" width="25"><img src="http://picsrv.fora.pl/AcidTechTiger/images/hdr_right.gif" width="25" height="27" alt="" /></td> </tr></table></caption> </thead> <tbody> <tr> <th class="thCornerL" width="22%" height="26">Author</th> <th class="thCornerR">Message</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>treegre4h3q</b></span></td> <td class="row1" height="28" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="http://picsrv.fora.pl/AcidTechTiger/images/post_old.gif" width="12" height="9" alt="Post" title="Post" border="0" /><span class="postdetails">Posted: Thu 5:22, 28 Apr 2011<span class="gen"> </span> Post subject: Diamond Mining</span></td> </tr> <tr> <td colspan="2"><hr /></td> </tr> <tr> <td colspan="2"><span class="postbody">monds are made up fully of carbon. Pressure (diamonds can’t manner upon 100 miles beneath the globes crust) and temperature (750+ degrees F) are the ingredients that “change” the diamond from mere carbon into a treasured commodity. After millions of years suffering this pressure and heat,cheap coach bags, the rough stones are stable in diamond-bearing rock and from there,/coach-wallets, await for a volcanic eruption to send them to the surface. <br />Diamond Mining Techniques <br />Pipe Mining: Primary Source-refers to the process of diamonds emerging to the earth’s surface in host rocks through volcanic pipes, which are pathways between the earth’s wrap and surface. <br />When an eruption occurs, other matters are carried up onward with the magma, or lava. If the eruption originates distant ample down in the earths surface, it could involve diamond-bearing rock, usually kimberlite or lamproite. <br />These eruptions have to be exceedingly forceful and move by lofty speeds, because if the diamonds remain in the magna because a long time of time, they could flame up if the temperatures alternatively turn apt graphite. <br />From here, they conduct a process shrieked open mining where the surface remnants are inspected for diamonds. Once those are tired, massive shafts are plunged into the floor next to the volcanic pipes and extra diamond-bearing rock is revived, and taken to a screening plant where the soil is separated from the diamonds. <br />Diamond Mining <br />Alluvial Mining: Secondary Source- Refers to the removal of rough diamonds that have been relocated to oceans and riverbeds via erosion. <br />After an eruption occurs, some of the diamond bearing rock namely supplanted, constantly settling in ocean beaches and creek beds. To extract this invaluable material, a process of Alluvial Mining namely conducted. In order to remove the rock from these districts, the water must be moved alongside to obtain to the ground of the sea or rill. Usually a walls of mud and stone is constructed. From there, the miners using bulldozers or pumps bring the rock to the surface. It is then taken to a screening factory where the taint and silt can be separated from the rough diamonds. <br />Rough Diamond Quality <br />After the rough diamonds are mined, less than 20% are gem-quality, the other 80% have additional uses. If not gem</span></td> </tr> </table></td> </tr> <tr> <td colspan="2" class="spaceRow"><img src="http://picsrv.fora.pl/AcidTechTiger/images/spacer.gif" alt="" width="1" height="1" /></td> </tr> </tbody> </table>
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