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Releases: Gradient-Flow-Lab/jewelry-hallmark-reference

v1.0.0 — Initial citation-grade release

22 May 05:50
@dinhnhat0401 dinhnhat0401
v1.0.0
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Jewelry Hallmark Reference v1.0.0

First public release of an open, MIT-licensed, citation-grade reference dataset for jewelry.

6 datasets, 219 records, schema-validated, source-cited.

Contents

  • data/hallmarks.json — 120 purity stamps and assay marks (JP, US, UK, EU, international)
  • data/gemstones.json — 49 gemstones with Mohs hardness, RI, SG, treatments
  • data/assay-offices.json — 15 assay offices worldwide, current and historical
  • data/gemological-laboratories.json — 15 major grading labs (GIA, AGS, IGI, AGL, Gübelin, SSEF, GRS, CGL, etc.)
  • data/karat-alloys.json — 15 alloy compositions per karat × color
  • data/british-date-letters.json — cycle structure for 5 British assay offices

Provenance

Every record cites primary sources (ISO 9202, FTC 16 CFR Part 23, UK Hallmarking Act, national assay offices, gemological labs). See SOURCES.md.

Quick use

curl -fsSL https://raw.githubusercontent.com/Gradient-Flow-Lab/jewelry-hallmark-reference/main/data/hallmarks.json | jq '.[] | select(.stamp == "K18")'

Citation

See CITATION.cff. License: MIT.

Built and maintained by the team behind Jewelry Expert AI Identifier.

Assets 3
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