Library
What it answers from
30 documents from the standards bodies, regulators and publishers the trade relies on. Every fact the assistant takes from them carries a hallmark naming the document and page.
CIBJO 15
- Diamond Terminology Guideline
- Emerald Guide
- Guide for Describing and Classifying Natural and Cultured Pearls
- Jade Guide
- Laboratory-Grown Diamond Guideline
- Precious Coral Guideline
- Ruby Guide
- Sapphire Guide
- The Coral Book (Blue Book)
- The Diamond Book (Blue Book)
- The Gemmological Laboratories Book (Blue Book)
- The Gemstone Book (Blue Book)
- The Pearl Book (Blue Book)
- The Precious Metals Book (Blue Book)
- The Responsible Sourcing Book (Blue Book)
European Union 2
- Commission Regulation (EU) No 494/2011 on cadmium
- Regulation (EU) 2017/821 on supply chain due diligence for tin, tantalum, tungsten and gold
Mineralogical Society of America 2
- Handbook of Mineralogy: Beryl
- Handbook of Mineralogy: Corundum
OECD 1
- OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas
Office of the Consumer Protection Board (Thailand), as published on ocac.go.th 1
- อัญมณีเจียระไนและเครื่องประดับอัญมณีเจียระไนเป็นสินค้าที่ควบคุมฉลาก (Cut gemstones and gemstone jewellery as label-controlled goods)
Responsible Jewellery Council 2
- Chain of Custody Standard
- Code of Practices Standard
Revenue Department of Thailand 1
- A Summary of Tax Measures Relating to Trading of Gems (Royal Decrees 599, 617, 618)
UK Assay Offices 1
- Hallmarking Guidance Notes
UK Parliament 1
- Hallmarking Act 1973
US Federal Trade Commission 1
- Guides for the Jewelry, Precious Metals, and Pewter Industries (16 CFR Part 23)
US Geological Survey 3
- Mineral Commodity Summaries 2025: Gemstones
- Mineral Commodity Summaries 2025: Gold
- Mineral Commodity Summaries 2025: Silver
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