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Discover the Meaning
Find out what a Hallmark is and why it's significant. Learn about the origins of this well-known symbol and how it has evolved over time.
Popular Hallmark Products
Explore a variety of Hallmark items, including cards, ornaments, and gifts. Discover unique designs that capture special moments and sentiments.
Celebrate with Hallmark
Join the tradition of celebrating life's moments with Hallmark products. Whether it's a birthday, holiday, or special occasion, there's a Hallmark for every moment.
Hallmark Guide
What Is a Hallmark?
A hallmark is an official mark applied by an authorised UK Assay Office confirming the purity of a precious metal item. It provides independent verification of gold, silver, platinum, or palladium content.
How to Read a Hallmark
A complete UK hallmark typically includes a sponsor mark, a fineness mark (such as 585 for 14K gold), and an assay office mark. For a full step-by-step explanation and placement examples, visit the dedicated guide below.
Read the full hallmark breakdownGold Fineness Reference Table
| Karat | Fineness | Gold Content |
|---|---|---|
| 9K | 375 | 37.5% gold |
| 10K | 417 | 41.7% gold |
| 14K | 585 | 58.5% gold |
| 18K | 750 | 75% gold |
| 22K | 916 | 91.6% gold |
| 24K | 999 | 99.9% gold |
Majestic Jewellery specialises in certified 14K gold (585).
Majestic Jewellery Sponsor Mark
Our registered sponsor mark appears as CMJ. This identifies the responsible company that submitted the piece for independent hallmarking.
Independent Verification
Eligible pieces are submitted to the London Assay Office for independent testing and official UK hallmarking. This ensures metal purity is externally verified rather than self-declared.
Learn about the London Assay Office process