fix(content): apply audit corrections to learn YAMLs#1
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Three-stage Gem-A verification pipeline corrections (per-slice agents → live gem-a.com lookups → deep web research). 14 high-priority edits across phenomena, fundamentals, equipment, origin, identification and species content. Highest-impact: - phenomena/adularescence: mechanism rewritten to Bøggild exsolution + combined scattering and thin-film interference (neither pure-Rayleigh nor pure-interference, per Gem-A and contemporary literature) - phenomena/play-of-colour: add interference alongside diffraction - phenomena/labradorescence: twin lamellae → Bøggild exsolution lamellae (An ~47-58, 100-300 nm spacing) - fundamentals/crystal-systems: orthorhombic minimum symmetry corrected (three two-fold axes, not "or 2 planes") - fundamentals/crystallography-advanced: tourmaline moved from -3m to 3m (acentric, holohedral 3m); twinning callout fixed - fundamentals/chemical-properties: Cr "oxide vs silicate" rule rewritten using crystal-field theory (bond distances and field splitting) - equipment/refractometer: di-iodomethane RI ~1.74 (1.81 is the glass hemisphere limit, not the contact liquid) - equipment/spectroscope: demantoid 443 nm reattributed Cr → Fe³⁺ doublet (438/444 nm) - equipment/polariscope: glass-may-remain-light caveat added - equipment/other-tools: di-iodomethane SG 3.32 → 3.33 - origin/kashmir: pargasite added as diagnostic inclusion (NOT sillimanite, which an earlier audit incorrectly proposed) - origin/burma/ruby: Mong Hsu discovery 1990s → 1992 - identification/synthetics: flux emerald c. 1935 (Espig / IG Farben); moissanite heavy liquid 3.32 → 3.33 - species/beryl: ri 1.577-1.583 → 1.560-1.600; bf 0.005-0.009 → 0.003-0.010 - species/spinel: ri 1.712-1.720 → 1.712-1.740 (mirror mineral-DB updates) Source of truth: ~/Downloads/gemmology-verification/00-master-report.md Build: Astro production build clean (697 pages, no Zod schema errors).
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Summary
-3m→3m; di-iodomethane RI corrected from 1.81 to ~1.74; demantoid 443 nm reattributed Cr → Fe³⁺; pargasite added as Kashmir sapphire diagnostic inclusion (NOT sillimanite, which an earlier audit incorrectly proposed); Mong Hsu ruby discovery year fixed to 1992species/*.yamlRI tables mirrored to the corresponding mineral-database PRVerification pipeline
Three-stage Gem-A verification (per-slice agents → live gem-a.com lookups via citation-verifier → deep web research for unverifiable claims). Source priority Gem-A → peer-reviewed (G&G, Journal of Gemmology) → manufacturer/wikipedia → last resort. Conflict resolution applied where later rounds reversed earlier "fixes" (e.g. Gilson opal stays 1974; demantoid stays chrysotile not byssolite; adularescence is both scattering and interference, not pure-Rayleigh).
Consolidated source of truth (gitignored, local):
~/Downloads/gemmology-verification/00-master-report.md.Test plan
gemmology.dev/src/content/learn//learn/phenomena/adularescence,/learn/origin/kashmir,/learn/equipment/spectroscope,/learn/fundamentals/crystallography-advancedafter merge~/Downloads/gemmology-verification/IMPL-C-summary.mdfor human review (twinning table, scattering prose, adularescence comparison wording, spinel prose RI reference)Companion PR
Mirrored RI/SG corrections in mineral-database: gemmology-dev/mineral-database#3