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Definition
| underground mining that involves building a concrete-lined tunnel under an ore deposit, then collecting the ore through openings in the liner |
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Definition
a recovery process that separates diamonds from lighter material
also called heavy media separation |
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Definition
| a horizontal tunnel drilled through a diamond pipe |
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Definition
| an apparatus that uses diamonds' affinity for grease to separate them from other minerals |
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Definition
| diamond rough whose color and clarity is such that it can be either polished or used industrially, depending on market conditions |
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Definition
| removal of mineral-bearing ore from a large surface excavation |
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Definition
| sand, gravel, or rock that covers a diamond pipe; must be removed to reach diamond-bearing ore |
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Definition
| reduction of newly mined ore to a manageable size |
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Definition
| any method used to separate diamonds from ore or alluvial sediments |
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Definition
| an apparatus that washes away dirt and clay from diamond-bearing ore |
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Definition
| a recovery method that uses x-rays to detect diamonds and an air jet to remove them from ore |
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