Dear Friends ,

Our company is attending The 8th Xiamen International Stone Fair, Our Booth No. is BT 031,we welcome you to Stand.

our company will attend Coverings  2008  Fair in Orlando this year to develop the USA market.
  The Details of our Stand in Coverings 2008 in Orlando is following,
  Coverings 2008,
  Orange County Convention Center
  Orlando, FL, USA, April 29 ¨C May 2, 2008
 Stand Number: 5767
  Welcome to visit our stand

  Supporting by our own factory ,Xiamen Chonglian Imp.&Exp.Co.,Ltd mainly produces all kinds of granite importer and marble products.including monuments.
fireplace mantels,countertop,vanitytop,stone carving and other construction materials We use the standard exporting packing,and the products are exported to Europe,North Amreica,Japan,middle east and etc.Meanwhile,Our products are highly praised in demestic market as well as foreign customers.
  Chonglian's great management faith is"Customer and Quality first,scientific management,good service".Meanwhile,We have passed ISO9001 Quality Management System in 2005,We warmly welcome the friends from demestic or abroad to our company,to exchange experience,realize the mutual benefit and creat great future.
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Home > News
Marble and Granite - What Produces the Shine?
Addtime£º2008-4-28 ¡¡¡¡
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Many people make the assumption that marble, granite and other finely polished natural stones shine because a polish has been added to them. Nothing could be further from the truth.
 
Natural stones are made of crystals. The crystals are made up of different minerals. Each mineral forms a different crystal shape. These different crystals interlock together to make up the stone. When stone is first quarried it has a very rough texture to its surface as it breaks along the crystal joints. By using a series of graduated grinders the stone is ground down. The grinders are normally made from industrial diamonds and to start the process a very rough one is used. It is the same principle as sanding down wood. You start with glass paper that is very coarse and gradually use finer and finer glass paper until you have a fine, smooth finish to the wood. With stone the glass paper is replaced with diamond studded pads and these get finer and finer.
 
What the grinding is doing is cutting the rough edges off the stone by scratching it and as the diamonds become smaller and smaller the scratches become finer and ultimately microscopic. What you end up with is a very smooth surface to the stone. The crystals have by a slow process of finer and finer grinding been worn down until on the surface they are all perfectly flat and smooth with each other. A perfectly flat surface will reflect the light uniformly and will look like glass.
 
Consider a mirror that reflects light uniformly giving you a clear sharp image. Make the glass curved or rippled and you get a less clear, less sharp image reflected back. The same applies to stone. If the crystals are flat then you get a perfect image reflected back and the stone looks incredibly shiny. Roughen the surface slightly and the reflected light ceases to give you a perfect reflection and the stone begins to dull. Any interference with the stones surface can cause this dulling to appear. It could be a series of minute scratches made by dirt or it could be caused by acid materials etching into the stone destroying its shine in that region.
 
To get the shine back the stone must be ground down again. Consequently the shine on a stone is not the product of adding some chemical to the stone but is a property of the stone itself. The harder the stone the more difficult it is to grind but the greater degree of shine that can be achieved, which is why polished granite has the greatest degree of shine, followed by marble then limestone.
 
David Andrew Smith is the owner of  a cleaning services company involved in the care and maintenance of natural stone flooring as well as providing cleaning services throughout the UK.
(cn-stonenet.com)
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