Metals & making
Gold karats: fineness, marks and alloys by country
What 9K, 14K, 18K, 22K and Thai 96.5% gold really contain, which fineness marks each market expects, and why colour and alloy matter as much as karat.
5 Oct 2026
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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.
Tagged “gold” · Clear