naat, noun
/nɑːt/
- Origin:
- Afrikaans, DutchShow more Afrikaans (from Dutch naad), seam, suture.
Diamond-trade
An irregularity in the structure of a diamond, caused by a change of direction in the grain; a ‘knot’ or blemish; a diamond having such a feature.
- Note:
- Used in the diamond industry world-wide.
1945 Industrial Diamond Rev. Sept. 205Knot, naat (Min.), irregularity of crystal structure in a single crystal diamond. Because the cleavage planes cannot easily be found, it is generally believed that such stones have a greater resistance to abrasion.
1984 G. Davies Diamond 228The blade..will find it very difficult to make any progress if it comes up against a piece of the diamond which has a different crystallographic orientation. These mis-oriented pieces, the ‘naats’, are analogous to knots in a piece of wood.
An irregularity in the structure of a diamond, caused by a change of direction in the grain; a ‘knot’ or blemish; a diamond having such a feature.
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