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How quickly can a claim become outdated?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: 2026-10-23002Hardness Is Not the Same as Indestructibilitylast factual review: 2026-10-23003Physical and Optical Propertieslast factual review: 2026-10-23004Atomic Types of Diamondlast factual review: 2026-10-23006Where Carbon Becomes Diamondlast factual review: 2026-10-23007Rocks That Preserve Diamondslast factual review: 2026-10-23008The Fluids from Which Diamonds Growlast factual review: 2026-10-23009The Age of a Diamond and the Time of Its Journeylast factual review: 2026-10-23013Rough Diamond: Reading an Uncut Crystallast factual review: 2026-10-23014From Rough to Polished Diamondlast factual review: 2026-10-23015Polished Yield and the Economics of Cutting Decisionslast factual review: 2026-10-23016The History of Diamond Cuttinglast factual review: 2026-10-23017Anatomy of a Polished Diamondlast factual review: 2026-10-23018Facet Architecture and Proportionslast factual review: 2026-10-23019Managing Lightlast factual review: 2026-10-23020Measurement, Polish, Symmetry, and Finishlast factual review: 2026-10-23023Historic Cuts and Modern Reproductionslast factual review: 2026-10-23024Recutting, Restoration, and Manufacturing Defectslast factual review: 2026-10-23026Carat Weight, Dimensions, and Face-Up Sizelast factual review: 2026-10-23027D-to-Z Color Gradinglast factual review: 2026-10-23028Clarity Gradinglast factual review: 2026-10-23030Fluorescence and Phosphorescencelast factual review: 2026-10-23031Grading Uncertainty and Consistencylast factual review: 2026-10-23043Crystals, Needles, Knots, and Metallic Inclusionslast factual review: 2026-10-23044Clouds, Pinpoints, Graining, and Twinning Wispslast factual review: 2026-10-23045Feathers, Fractures, Cavities, and Chipslast factual review: 2026-10-23046Strain, Plastic Deformation, and Growth Zoneslast factual review: 2026-10-23047Clarity Plots, Clarity, and Durabilitylast factual review: 2026-10-23055Prices, Costs, and Resalelast factual review: 2026-10-23056Environmental and Social Claimslast factual review: 2026-10-23058Laser Drillinglast factual review: 2026-10-23059Fracture Fillinglast factual review: 2026-10-23060HPHT Treatment of Natural Diamondslast factual review: 2026-10-23062Coatings and Surface Modificationslast factual review: 2026-10-23064Simulants: How to Structure the Problemlast factual review: 2026-10-23065Moissanite, Cubic Zirconia, and Other Simulantslast factual review: 2026-10-23066A Practical Identification Workflowlast factual review: 2026-10-23067Handheld Testers and False Positiveslast factual review: 2026-10-23068Microscopylast factual review: 2026-10-23069Absorption Spectroscopylast factual review: 2026-10-23070Infrared, Raman, and Photoluminescence Analysislast factual review: 2026-10-23071Luminescence Imaging and Growth Patternslast factual review: 2026-10-23072Advanced Analytical Methodslast factual review: 2026-10-23080Chain of Custody and Documented Provenancelast factual review: 2026-10-23082Anatomy of Diamond Jewelrylast factual review: 2026-10-23083Setting Styleslast factual review: 2026-10-23084Precious Metals and Their Relationship with Diamondslast factual review: 2026-10-23085Lifestyle-Based Designlast factual review: 2026-10-23086Stone Setting and Bench Repairlast factual review: 2026-10-23087Cleaning, Care, and Storagelast factual review: 2026-10-23088Appraisal, Insurance, and Securitylast factual review: 2026-10-23089Inheritance, Repurposing, and Resale Preparationlast factual review: 2026-10-23090Purchase Goals, Budget, and Prioritieslast factual review: 2026-10-23091How to Select and Compare a Diamondlast factual review: 2026-10-23092Buying Onlinelast factual review: 2026-10-23093Engagement Rings and Custom Orderslast factual review: 2026-10-23094How Diamond Pricing Workslast factual review: 2026-10-23095Resale, Liquidity, Buyback, and the Investment Thesislast factual review: 2026-10-23096India, Golconda, Brazil, and Early Tradelast factual review: 2026-10-23097South Africa, De Beers, and Industrializationlast factual review: 2026-10-23098Global Centers of Cutting, Trade, and Financelast factual review: 2026-10-23099Marketing, the 4Cs, Laboratories, and the Digital Marketlast factual review: 2026-10-23100Conflict Diamonds and the Kimberley Processlast factual review: 2026-10-23101Mining Communities, Labor, and the Environmentlast factual review: 2026-10-23103Famous Diamonds, Crown Jewels, and Legendslast factual review: 2026-10-23104Theft, Smuggling, Laundering, Forensics, and Ownership Disputeslast factual review: 2026-10-23
Monitored
17 chapters
005The Limits of Gemologylast factual review: 2026-10-23010Kimberlite and Lamproite: The Final Vehicle from the Depthslast factual review: 2026-10-23011Superdeep Diamondslast factual review: 2026-10-23012Unusual Natural Formslast factual review: 2026-10-23032Why Diamonds Have Colorlast factual review: 2026-10-23034Yellow, Orange, and Brown Diamondslast factual review: 2026-10-23035Pink, Red, and Purple Diamondslast factual review: 2026-10-23036Blue, Gray, and Violet-Blue Diamondslast factual review: 2026-10-23038Black, White, and Other Unusual Appearanceslast factual review: 2026-10-23040Inclusions as a Geological Archivelast factual review: 2026-10-23041Mineral Inclusionslast factual review: 2026-10-23042Fluid and Multiphase Inclusionslast factual review: 2026-10-23049HPHT Growthlast factual review: 2026-10-23050CVD Growthlast factual review: 2026-10-23051Growth Zones, Defects, and Inclusionslast factual review: 2026-10-23061Irradiation and Annealinglast factual review: 2026-10-23063Combined and Emerging Treatmentslast factual review: 2026-10-23
Time-sensitive
21 chapters
021The Round Brilliant and Cut-Grading Systemslast factual review: 2026-10-23022Fancy Shapeslast factual review: 2026-10-23025The 4Cs as a Common Language—and Their Limitslast factual review: 2026-10-23029Cut-Grading Systems and Their Limitationslast factual review: 2026-10-23033How Fancy Colors Are Gradedlast factual review: 2026-10-23037Green and Chameleon Diamondslast factual review: 2026-10-23039Color in Natural, Treated, and Synthetic Diamondslast factual review: 2026-10-23048What Is a Synthetic Diamond?last factual review: 2026-10-23052Post-Growth Treatments of Synthetic Diamondslast factual review: 2026-10-23053Identification and Screeninglast factual review: 2026-10-23054Quality and Grading of Synthetic Diamondslast factual review: 2026-10-23057Why Diamonds Are Treatedlast factual review: 2026-10-23073Screening Devices and the ASSURE Programlast factual review: 2026-10-23074Counterfeiting and Digital Fraudlast factual review: 2026-10-23075What a Laboratory Does—and Does Not Dolast factual review: 2026-10-23076Anatomy of a Laboratory Reportlast factual review: 2026-10-23077Laboratory Systems and Comparabilitylast factual review: 2026-10-23078Laser Inscription and Matching a Stone to Its Reportlast factual review: 2026-10-23079Geographic-Origin Reportslast factual review: 2026-10-23081Blockchain, Digital Twins, and AI Verificationlast factual review: 2026-10-23105Industry, Science, and the Future of Diamondlast factual review: 2026-10-23
Critical currentness