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Closes ~70 distinct topic gaps identified in the May 2026 Gem-A FGA syllabus audit. Foundation coverage 72%→~100%; Diploma 47%→≥80%. Equipment (5 new + spectroscope expansion): chelsea-colour-filter, sg-measurement, conoscope, advanced-lab-instruments, diamond-screening; spectroscope.yaml gains the 27 named-spectra reference table. Fundamentals (3 new + 2 expansions): colour-theory (CFT, charge transfer, colour centres), twin-laws (spinel, Carlsbad, Manebach, Baveno, Brazil, Dauphiné), optic-sign-determination; crystal-systems gains 32-point-groups appendix; physical-properties gains heavy liquids, tenacity, magnetism. Phenomena (7 new): schiller, silk-effect, fluorescence, fire-dispersion, orient, tenebrescence, alexandrite-effect. Treatments expansion: identification/treatments.yaml expanded with per-species depth; identification/treatments-deep/ adds Be diffusion, lead-glass ruby, HPHT diamond, jade B/C polymer-impregnation FTIR signatures. Origin (28 new files across 11 regions): thailand/, cambodia, vietnam, pakistan/, afghanistan/, tajikistan, india, iran, russia/, usa/, mozambique, zimbabwe, ethiopia, colombia-mines (Muzo/Chivor/Coscuez), brazil-additional. Astro build: 791 pages (was 697; +94). All values verified against Gem-A, Journal of Gemmology, G&G, Read 7th ed., or peer-reviewed sources.
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Context
Follow-up to the audit-corrections campaign (PR #1, fixed errors).
This PR closes the content gaps identified by the May 2026 Gem-A FGA Foundation + Diploma syllabus audit (
~/Downloads/gema-coverage-audit/gap-report.md).Foundation coverage 72%→~100%; Diploma coverage 47%→≥80%.
What's added
Equipment (5 new + spectroscope expansion)
chelsea-colour-filter, sg-measurement (hydrostatic + heavy liquids), conoscope (Bertrand lens + interference figures + optic sign), advanced-lab-instruments (FTIR, UV-Vis, Raman, EDXRF, PL), diamond-screening (DiamondView, DiamondSure).
spectroscope.yamlgains the 27 named-spectra reference table (12 Foundation + 15 Diploma extension).Fundamentals (3 new + 2 expansions)
colour-theory (CFT, charge transfer Fe²⁺–Ti⁴⁺, colour centres), twin-laws (spinel, Carlsbad, Manebach, Baveno, Brazil, Dauphiné), optic-sign-determination.
crystal-systems.yamlgains 32-point-groups appendix;physical-properties.yamlgains heavy liquids, tenacity vocabulary, magnetism.Phenomena (7 new)
schiller, silk-effect, fluorescence, fire-dispersion, orient, tenebrescence, alexandrite-effect.
Treatments
identification/treatments.yamlexpanded per-species; newidentification/treatments-deep/with Be diffusion (SIMS/LA-ICP-MS detection), lead-glass ruby, HPHT diamond, CVD diamond.Origin (28 new files across 11 regions)
thailand/{overview,ruby,sapphire,zircon}, cambodia, vietnam, pakistan/{overview,emerald,ruby,topaz}, afghanistan/{overview,lapis,emerald}, tajikistan, india, iran, russia/{overview,demantoid,alexandrite,emerald}, usa/{overview,montana-sapphire,utah-red-beryl}, mozambique, zimbabwe, ethiopia, colombia-mines (Muzo/Chivor/Coscuez), brazil-additional.
Pipeline
research-synthesist(10 agents, 4 waves) →citation-verifier(218 claims reviewed) → builders (parallel, file-locked scopes). Source priority: Gem-A → peer-reviewed (Journal of Gemmology, G&G) → Webster/Read 7th ed. → Mindat. Source-of-truth manifest:~/Downloads/gema-content-research/VERIFIED.md.Validation
npm run build: 791 pages built (was 697; +94)equipment|fundamentals|phenomena|identification|origincategories)order,category,difficulty, and at least onerelated[]cross-reference