Term
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Definition
| a deposit where gems are eroded from their source rock, then transported away from the source and further concentrated |
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Term
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Definition
| large-scale character sampling |
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Term
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Definition
| testing for the size, shape, clarity, and color of the diamonds in a deposit |
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Term
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Definition
| diamond rough with good enough size, shape, clarity, and color to produce a polished stone suitable for use in jewelry |
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Term
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Definition
| separating heavier materials (diamonds) from a test sample |
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Term
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Definition
| minerals formed together with diamonds at great depths and brought to the surface by the same kimberlites or lamproites |
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Term
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Definition
| diamond rough suitable for use in tools, drills, abrasives, and other industrial applications |
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Term
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Definition
| secondary diamond deposit carried by rivers or streams to the ocean floor or shoreline |
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Term
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Definition
| screening for the presence of tiny diamonds in a sample |
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Term
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Definition
| concentration of diamond in a potentially mineable deposit |
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Term
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Definition
| gems found in the rock that carried them to the surface |
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Term
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Definition
| gems found away from their primary source |
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