Optics
Extinction
Areas of a stone that look very dark because little useful light reaches the observer from them in the given geometry.
Accepted international termStable3 chapters
TERM USAGE
How this term is used on the platform
- Editorial note
- The problem is dark areas that are too large, uneven, or oddly placed, so that the contrast pattern is less pleasing.
FORM IN THE CROATIAN EDITION
How the Croatian edition writes this term
- Level
- International term in italics
- Form
- extinction
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.
House of KacinariDiamonds: The Book
GIAGIA 4Cs / Diamond Quality FactorsPrimary internal terminology and context source across 105 chapters.
Widely used definitions for color, clarity, cut, carat and optical appearance terms.