Primary internal terminology and context source across 105 chapters.
HOK-DIA-TERM-173 · 4Cs and grading
Included
The GIA clarity group I1, I2, and I3, in which inclusions can be obvious at 10× magnification and may affect transparency or durability.
PreferredStable1 chapter
TERM USAGE
How this term is used on the platform
- Synonyms / variants
- I1 · I2 · I3
- Discouraged
- imperfect
- Editorial note
- GIA uses included rather than the older term imperfect.
RELATED TERMS
Terminology network
FULL CONTEXT
Related chapters of The Book
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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