{
  "version": "1.1",
  "last_reviewed": "2026-09-06",
  "publisher": "AsscherDiamond.com",
  "sources": [
    {
      "id": "gia-diamond-cut",
      "publisher": "Gemological Institute of America (GIA)",
      "title": "Diamond Cut",
      "url": "https://4cs.gia.edu/en-us/diamond-cut/",
      "source_type": "primary_authoritative",
      "supports": [
        "cut terminology",
        "round-brilliant cut-grade scope",
        "fancy-shape distinction"
      ],
      "reviewed": "2026-09-06"
    },
    {
      "id": "gia-fancy-cut-faq",
      "publisher": "Gemological Institute of America (GIA)",
      "title": "Is there a cut grading system for fancy shaped diamonds?",
      "url": "https://www.gia.edu/FAQ/gia-faq-analysis-grading-system-fancy-shape-diamond",
      "source_type": "primary_authoritative",
      "reviewed": "2026-09-06",
      "supports": [
        "absence of current GIA overall fancy-shape cut grading system",
        "fancy-shape cut grading limitation"
      ]
    },
    {
      "id": "gia-grading-process",
      "publisher": "Gemological Institute of America (GIA)",
      "title": "How GIA Grades Diamonds",
      "url": "https://www.gia.edu/gem-lab-how-gia-grades-diamond",
      "source_type": "primary_authoritative",
      "supports": [
        "laboratory grading process",
        "cut-grade scope",
        "polish and symmetry"
      ],
      "reviewed": "2026-09-06"
    },
    {
      "id": "gia-carat",
      "publisher": "Gemological Institute of America (GIA)",
      "title": "Diamond Carat Weight",
      "url": "https://4cs.gia.edu/en-us/diamond-carat-weight/",
      "source_type": "primary_authoritative",
      "supports": [
        "carat definition",
        "carat as weight"
      ],
      "reviewed": "2026-09-06"
    },
    {
      "id": "gia-color",
      "publisher": "Gemological Institute of America (GIA)",
      "title": "GIA 4Cs Color",
      "url": "https://www.gia.edu/gia-about/4cs-color",
      "source_type": "primary_authoritative",
      "supports": [
        "D-to-Z color scale",
        "color grading conditions"
      ],
      "reviewed": "2026-09-06"
    },
    {
      "id": "gia-clarity",
      "publisher": "Gemological Institute of America (GIA)",
      "title": "GIA 4Cs Clarity",
      "url": "https://www.gia.edu/4cs-clarity",
      "source_type": "primary_authoritative",
      "supports": [
        "clarity scale",
        "clarity grading factors"
      ],
      "reviewed": "2026-09-06"
    },
    {
      "id": "royal-asscher-history",
      "publisher": "Royal Asscher",
      "title": "Cut for Beauty",
      "url": "https://royalasscher.com/pages/cut-for-beauty",
      "source_type": "first_party_historical",
      "supports": [
        "Royal Asscher company history",
        "1902 original Asscher narrative",
        "58-facet branded-history context"
      ],
      "reviewed": "2026-09-06"
    },
    {
      "id": "royal-asscher-comparison",
      "publisher": "Royal Asscher",
      "title": "Royal Asscher Cut vs Asscher Cut",
      "url": "https://royalasscher.com/pages/royal-asscher-cut-vs-asscher-cut",
      "source_type": "first_party_branded",
      "supports": [
        "Royal Asscher branded-cut terminology",
        "74-facet Royal Asscher description"
      ],
      "reviewed": "2026-09-06"
    }
  ],
  "methodology_url": "https://asscherdiamond.com/about/research-methodology.html",
  "evidence_labels": {
    "primary_source_fact": "Directly supported within the source scope",
    "editorial_screening_range": "AsscherDiamond.com comparison/filter guidance; not a laboratory standard",
    "reference_range": "Versioned planning values with explicit limitations; not a measured population estimate",
    "measured_market_observation": "Requires retained raw rows, date, cohort definition, sample count and statistic"
  }
}