Primary internal terminology and context source across 105 chapters.
HOK-DIA-TERM-030 · 4Cs and grading
Blemish
An external characteristic on the surface of a polished diamond that enters clarity and/or finish interpretation depending on its type and the grading system.
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TERM USAGE
How this term is used on the platform
- Synonyms / variants
- surface characteristic
- Editorial note
- Do not equate a blemish with an inclusion, which is an internal or partly internal characteristic.
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TERMINOLOGY BASIS
Sources and authorities
The records below form the terminology basis for this entry or its category. This does not mean that every source defines every word on this page. The canonical manuscript remains the primary contextual source, while each external standard, laboratory policy, or regulatory guideline applies only within its own scope.
Widely used definitions for color, clarity, cut, carat and optical appearance terms.
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