Jewellery glossary reference guide from OD's Jewellers

Jewellery Glossary Guide

A–Z Reference | Materials, Technologies & Techniques

By OD's Jewellers | Updated April 2026 | 25 min read

OD's Jewellers · St Helens since 2015

The Jewellery Knowledge Centre

Twelve plain-English guides to everything that makes jewellery special -- metals, gemstones, settings, sizing and care. Written by people who sell and look after it, not copy-pasted spec sheets.

Whether you are buying your first piece of fine jewellery or just want to know what "925", "vermeil" or "rhodium-plated" actually means, start anywhere below. Every guide is grounded in the jewellery we actually stock -- Nomination, Clogau, Kit Heath, ChloBo, Coeur de Lion, Thomas Sabo, Olivia Burton, Vivienne Westwood, UNOde50, Diamonfire and more.

Jewellery Glossary

Quick single-term explainers -- the metals, stones, settings, brand systems and certifications you will see on the label.

Select a term tile above to view its full definition.

OD's Jewellers · St Helens since 2015

The Watch Knowledge Centre

Twelve plain-English guides to everything that makes a watch tick -- movements, materials, complications, sizing and care. Written by people who sell and service them, not copy-pasted spec sheets.

Whether you are buying your first proper watch or just want to know what "Powermatic 80" or "200m water resistant" actually means, start anywhere below. Every guide is grounded in the watches we actually stock -- Tissot, Citizen, BOSS, Tommy Hilfiger, Olivia Burton, Vivienne Westwood and Swarovski.

Watch Glossary

Quick single-term explainers -- the watch movements, glass and brand systems you will see on the spec sheet.

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