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Guides and interactive explainers on gemstones, diamonds, metals and making jewellery, written for people in the trade and checked against named sources.

Business & trade

Design protection: rights and time limits in the EU, UK, US, China and India

Registered and unregistered design rights, copyright and how long they last in the EU, UK, USA, China and India, plus the habits that make a claim stronger.

5 Oct 2026

Business & trade

Bangkok and Chanthaburi: sourcing coloured stones

How Thailand's two great gem centres work, what to expect on a first buying trip, and the habits that keep a new buyer safe.

5 Oct 2026