GIA · Undated; accessed 13 November 2026
The 4Cs of diamond quality
The 4Cs describe colour, clarity, cut and carat weight. Compare the full report and the stone, rather than one grade.
Read the official source →RESEARCH & INTELLIGENCE
Evidence before opinion.
A curated library of primary sources, with clear dates and a practical explanation of what each source supports.
11 sources
GIA · 2019; accessed 13 November 2026
Natural and laboratory-grown diamonds
Natural and laboratory-grown diamonds have essentially the same chemical, physical and optical properties. Reliable separation requires appropriate professional testing. This historical article is used for material science, not current report formats.
Read the official source →GIA · Undated; accessed 13 November 2026
Report Check
Use the issuing laboratory’s official report service. A matching online record alone does not prove the identity of the stone offered.
Read the official source →Kimberley Process · Undated; accessed 13 November 2026
Frequently asked questions
The certification scheme concerns international rough-diamond trade. It does not certify individual jewellers or replace a consumer’s stone-specific sourcing questions.
Read the official source →De Beers Group · 29 May 2026
GIA / Tracr agreement
De Beers and GIA announced a definitive agreement for GIA to acquire 30% of Tracr, supporting the platform’s move towards industry-wide provenance infrastructure. This is an announced agreement, not independent confirmation of closing.
Read the official source →De Beers Group · 31 May 2024
Origins strategy
The strategy links natural-diamond marketing, provenance technology and retail. Subsequent updates should be read alongside the original plan.
Read the official source →De Beers Group · 30 July 2026
2026 interim results
The company reported continued work on Origins, including natural-diamond demand and a more streamlined cost base. This is company-reported information.
Read the official source →Signet Jewelers · Fiscal 2026; accessed 13 November 2026
Fiscal 2026 annual report
Signet describes Grow Brand Love, differentiated brands and the premium positioning of Blue Nile. Strategic statements are company plans, not guaranteed outcomes.
Read the official source →Signet Jewelers · 11 August 2026
Blue Nile leadership appointment
The appointment announcement describes Blue Nile’s intended development as an elevated luxury brand anchored in natural diamonds.
Read the official source →Chow Tai Fook Jewellery Group · 11 June 2026
FY2026 annual results
The group connects brand transformation with craftsmanship, heritage storytelling, customer experience and digital engagement.
Read the official source →Chow Tai Fook Jewellery Group · Undated; accessed 13 November 2026
Environment and traceability
Published goals include country-of-origin traceability for T•MARK diamonds by 2029 and precious metals and gemstones by 2030. These are targets, not statements of universal coverage today.
Read the official source →Reviewed 13 November 2026. Corporate publications reflect the publisher’s own position. Announced investments and targets are identified as such. This library provides dated context rather than a live market-price service.