Foundational material that normally changes slowly.
LIVING REFERENCE
How quickly can a claim become outdated?
Currentness is separate from evidentiary quality. A chapter can be well-supported and still need frequent review when it concerns prices, sanctions, laboratory rules, or new technology. Currentness and factual-review dates use the shared canonical chapter metadata and are presented here against the English Book.
Material reviewed periodically for meaningful change.
Industry, standards, market, or institutional changes can materially affect meaning.
Check the controlling source for the relevant jurisdiction and date before a practical decision.
Stable
66 chapters
001Carbon That Became Diamondlast factual review: 2026-08-08002Hardness Is Not the Same as Indestructibilitylast factual review: 2026-08-08003Physical and Optical Propertieslast factual review: 2026-08-15004Atomic Types of Diamondlast factual review: 2026-08-15006Where Carbon Becomes Diamondlast factual review: 2026-08-15007Rocks That Preserve Diamondslast factual review: 2026-08-08008The Fluids from Which Diamonds Growlast factual review: 2026-08-08009The Age of a Diamond and the Time of Its Journeylast factual review: 2026-08-08013Rough Diamond: Reading an Uncut Crystallast factual review: not recorded014From Rough to Polished Diamondlast factual review: not recorded015Polished Yield and the Economics of Cutting Decisionslast factual review: not recorded016The History of Diamond Cuttinglast factual review: not recorded017Anatomy of a Polished Diamondlast factual review: not recorded018Facet Architecture and Proportionslast factual review: not recorded019Managing Lightlast factual review: not recorded020Measurement, Polish, Symmetry, and Finishlast factual review: not recorded023Historic Cuts and Modern Reproductionslast factual review: not recorded024Recutting, Restoration, and Manufacturing Defectslast factual review: not recorded026Carat Weight, Dimensions, and Face-Up Sizelast factual review: not recorded027D-to-Z Color Gradinglast factual review: not recorded028Clarity Gradinglast factual review: not recorded030Fluorescence and Phosphorescencelast factual review: not recorded031Grading Uncertainty and Consistencylast factual review: not recorded043Crystals, Needles, Knots, and Metallic Inclusionslast factual review: not recorded044Clouds, Pinpoints, Graining, and Twinning Wispslast factual review: not recorded045Feathers, Fractures, Cavities, and Chipslast factual review: not recorded046Strain, Plastic Deformation, and Growth Zoneslast factual review: 2026-08-08047Clarity Plots, Clarity, and Durabilitylast factual review: not recorded055Prices, Costs, and Resalelast factual review: not recorded056Environmental and Social Claimslast factual review: not recorded058Laser Drillinglast factual review: 2026-08-07059Fracture Fillinglast factual review: 2026-08-07060HPHT Treatment of Natural Diamondslast factual review: 2026-08-07062Coatings and Surface Modificationslast factual review: 2026-08-07064Simulants: How to Structure the Problemlast factual review: not recorded065Moissanite, Cubic Zirconia, and Other Simulantslast factual review: not recorded066A Practical Identification Workflowlast factual review: not recorded067Handheld Testers and False Positiveslast factual review: not recorded068Microscopylast factual review: not recorded069Absorption Spectroscopylast factual review: not recorded070Infrared, Raman, and Photoluminescence Analysislast factual review: not recorded071Luminescence Imaging and Growth Patternslast factual review: not recorded072Advanced Analytical Methodslast factual review: 2026-08-07080Chain of Custody and Documented Provenancelast factual review: not recorded082Anatomy of Diamond Jewelrylast factual review: not recorded083Setting Styleslast factual review: not recorded084Precious Metals and Their Relationship with Diamondslast factual review: not recorded085Lifestyle-Based Designlast factual review: not recorded086Stone Setting and Bench Repairlast factual review: not recorded087Cleaning, Care, and Storagelast factual review: not recorded088Appraisal, Insurance, and Securitylast factual review: not recorded089Inheritance, Repurposing, and Resale Preparationlast factual review: not recorded090Purchase Goals, Budget, and Prioritieslast factual review: not recorded091How to Select and Compare a Diamondlast factual review: not recorded092Buying Onlinelast factual review: not recorded093Engagement Rings and Custom Orderslast factual review: not recorded094How Diamond Pricing Workslast factual review: not recorded095Resale, Liquidity, Buyback, and the Investment Thesislast factual review: not recorded096India, Golconda, Brazil, and Early Tradelast factual review: not recorded097South Africa, De Beers, and Industrializationlast factual review: not recorded098Global Centers of Cutting, Trade, and Financelast factual review: not recorded099Marketing, the 4Cs, Laboratories, and the Digital Marketlast factual review: not recorded100Conflict Diamonds and the Kimberley Processlast factual review: not recorded101Mining Communities, Labor, and the Environmentlast factual review: not recorded103Famous Diamonds, Crown Jewels, and Legendslast factual review: not recorded104Theft, Smuggling, Laundering, Forensics, and Ownership Disputeslast factual review: not recorded
Monitored
17 chapters
005The Limits of Gemologylast factual review: 2026-08-15010Kimberlite and Lamproite: The Final Vehicle from the Depthslast factual review: 2026-08-15011Superdeep Diamondslast factual review: 2026-08-15012Unusual Natural Formslast factual review: 2026-08-08032Why Diamonds Have Colorlast factual review: 2026-08-08034Yellow, Orange, and Brown Diamondslast factual review: 2026-08-08035Pink, Red, and Purple Diamondslast factual review: 2026-08-08036Blue, Gray, and Violet-Blue Diamondslast factual review: 2026-08-08038Black, White, and Other Unusual Appearanceslast factual review: 2026-08-08040Inclusions as a Geological Archivelast factual review: 2026-08-08041Mineral Inclusionslast factual review: 2026-08-08042Fluid and Multiphase Inclusionslast factual review: 2026-08-08049HPHT Growthlast factual review: 2026-08-08050CVD Growthlast factual review: 2026-08-08051Growth Zones, Defects, and Inclusionslast factual review: 2026-08-08061Irradiation and Annealinglast factual review: 2026-08-07063Combined and Emerging Treatmentslast factual review: 2026-08-07
Time-sensitive
21 chapters
021The Round Brilliant and Cut-Grading Systemslast factual review: 2026-08-07022Fancy Shapeslast factual review: 2026-08-07025The 4Cs as a Common Language—and Their Limitslast factual review: 2026-08-08029Cut-Grading Systems and Their Limitationslast factual review: 2026-08-08033How Fancy Colors Are Gradedlast factual review: 2026-08-08037Green and Chameleon Diamondslast factual review: 2026-08-08039Natural, Treated, and Laboratory-Created Colorlast factual review: 2026-08-07048What Is a Laboratory-Grown Diamond?last factual review: 2026-08-07052Post-Growth Treatments of Laboratory-Grown Diamondslast factual review: 2026-08-08053Identification and Screeninglast factual review: 2026-08-07054Quality and Grading of Laboratory-Grown Diamondslast factual review: 2026-08-07057Why Diamonds Are Treatedlast factual review: 2026-08-07073Screening Devices and the ASSURE Programlast factual review: 2026-08-07074Counterfeiting and Digital Fraudlast factual review: 2026-08-07075What a Laboratory Does—and Does Not Dolast factual review: 2026-08-07076Anatomy of a Laboratory Reportlast factual review: 2026-08-07077Laboratory Systems and Comparabilitylast factual review: 2026-08-07078Laser Inscription and Stone Matchinglast factual review: 2026-08-07079Geographic-Origin Reportslast factual review: 2026-08-07081Blockchain, Digital Twins, and AI Verificationlast factual review: 2026-08-07105Industry, Science, and the Future of Diamondlast factual review: 2026-08-15
Critical currentness