English: knotlineRussian translation: - 
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English to Russian translations [PRO]
Science - Mining & Minerals / Gems / diamonds | | English term or phrase: knotline | | the type of a defect in a diamond |
| | Clarification request(s) and responseMikhail Kriviniouk (asker): 8:54pm Mar 6, 2004: asked before? - no satisfactory answer was provided...
Mikhail Kriviniouk (asker): 12:08pm Mar 7, 2004: found the answer ... - knot line = twinning line = двойниковый шов
Mikhail Kriviniouk (asker): 1:51pm Mar 7, 2004: to Dmitri - You are absolutely right. There does not seem to be a translation which is not of a descriptive type...
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| | трещина по спайности | Explanation:
Twin Lines, Knot Lines or Grain Lines
These are lines that are caused by twinning or by large inclusions that are oriented differently from the host crystal. They stand out as visible lines at the surface. Twinning lines or knot lines are distinguished easily from polishing marks by the fact that they run across facet junctions. These should not be confused with crystal growth lines, which affect light in a manner that makes them visible as a banded effect within the diamond, instead of on the surface.
http://www.a-diamonds.com/tutorials/externalinternal.html
Twin, Knot or Grain Lines:
A diamond with strong twinning may show twinning, or grain lines. If a gem has a large included crystal (a knot) whose grain runs opposite that of the host crystal, it will show a knot line. When these occur, the diamond presents two areas of varying hardness to the polishing lap. Hence, they do not polish smooth and the lines stand out from the surface. Unlike polishing marks, twinning and knot lines run across facet junctions. Growth lines look similar, but they are distinguished by being internal and do not stand out.
http://www.gem-resource.com/gemology/clarity_grading_of_diam...
Здесь описание дефектов в алмазах на русском языке:
http://www.marsdiamond.com/Russian/quality.htm
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Note added at 15 hrs 31 mins (2004-03-07 12:23:27 GMT) Post-grading
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Как я понял из ссылок knot line не тоже самое, что twinning line |
| Selected response from:
Nik-On/Off
Ukraine
| Note from asker to answererВаши ссылки помогли. Спасибо
2 KudoZ points were awarded for this answer |
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1 hr confidence:  peer agreement (net): +1 |
| линий от выходящих на поверхность кристаллических включений (сучков)
Explanation:
Линия роста может образоваться на поверхности грани, если через нее проходит плоскость двойникования. Тогда на одной и той же грани мягкие направления могут быть прямо противоположными. При полировке линия роста проявляется как линия раздела этих направлений и становится видной на поверхности грани. Иногда линия роста имеет вид шва. Эту линию относят к поверхностному грейнингу, под которым понимают и другие феномены структурных изменений. Например, на поверхности грани могут быть видны одна или несколько волнистых линий, линий от выходящих на поверхность кристаллических включений (сучков) и т.д.
http://www.marsdiamond.com/Russian/quality.htm (ссылка не моя, поэтому на очки не претендую)
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Note added at 2004-03-06 22:45:02 (GMT)
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наверное по аналогии этот дефект можно было бы назвать \"сучковатостью\", хоть и звучит ужасно :)
| odaj
Ukraine
Native speaker of:  Ukrainian
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1 hr confidence:  peer agreement (net): +2 |
| трещина по спайности
Explanation:
Twin Lines, Knot Lines or Grain Lines
These are lines that are caused by twinning or by large inclusions that are oriented differently from the host crystal. They stand out as visible lines at the surface. Twinning lines or knot lines are distinguished easily from polishing marks by the fact that they run across facet junctions. These should not be confused with crystal growth lines, which affect light in a manner that makes them visible as a banded effect within the diamond, instead of on the surface.
http://www.a-diamonds.com/tutorials/externalinternal.html
Twin, Knot or Grain Lines:
A diamond with strong twinning may show twinning, or grain lines. If a gem has a large included crystal (a knot) whose grain runs opposite that of the host crystal, it will show a knot line. When these occur, the diamond presents two areas of varying hardness to the polishing lap. Hence, they do not polish smooth and the lines stand out from the surface. Unlike polishing marks, twinning and knot lines run across facet junctions. Growth lines look similar, but they are distinguished by being internal and do not stand out.
http://www.gem-resource.com/gemology/clarity_grading_of_diam...
Здесь описание дефектов в алмазах на русском языке:
http://www.marsdiamond.com/Russian/quality.htm
--------------------------------------------------
Note added at 15 hrs 31 mins (2004-03-07 12:23:27 GMT) Post-grading
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Как я понял из ссылок knot line не тоже самое, что twinning line
| Nik-On/Off
Ukraine
Native speaker of: Russian, Ukrainian
PRO pts in category: 10
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| Note from asker to answerer| Ваши ссылки помогли. Спасибо |
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The translation workplace 
