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More advanced methods of mining use large machinery that moves the alluvial in to large shorting pans that send different densities to smaller picking tables followed by a grease table. Since diamonds are mostly water repellent, they are sorted in alluvial deposits by using grease. While other minerals develop a water coding and slide of the grease, the water resistant diamonds stick to the grease and are collected...

While other minerals develop a water coding and slide of the grease, the water resistant diamonds stick to the grease and are collected.

Mining kimberllite pipe requires a more advanced degree of mining technology and is more expensive. The first step in mining a kimberlite pipe is to dig the pit. In "open-pit" or "open-cast" mining, the layers of rock are dug up and eventually tunnels and pipe are build so the hard ore material can be removed with large hydraulic shovels and trucks...

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