---
title: "Understanding Gold Hallmarks (UK)"
source: "https://goldealers.co.uk/knowledge/gold/understanding-gold-hallmarks-uk"
date: "2025-12-02"
---

# Understanding Gold Hallmarks (UK)

Hallmarks are tiny stamps that carry significant information about gold items. In this article, we dive deeper into UK gold hallmarks specifically, covering all hallmark symbols beyond just purity marks. Goldealers' experts are trained in reading hallmarks, and here we share that knowledge so you can decode these marks yourselves.

> **Quick Summary:** A full UK hallmark contains up to four marks: Sponsor's Mark (maker), Fineness Mark (purity like 375 or 750), Assay Office Mark (where tested), and optionally a Date Letter (year). These tiny symbols tell you who made the item, its gold purity, and where/when it was assayed.

## Mandatory Hallmark Symbols

A complete UK hallmark has several components, each providing specific information about the gold item.

### The Four Parts of a UK Hallmark

**Complete Hallmark Structure:**

```
[Maker] [Fineness] [Assay Office] [Date Letter]
  JW      750         🦁              r
```

This hypothetical hallmark tells us:
- Made by JW (sponsor)
- 18ct gold (750)
- Tested in London (leopard's head)
- Hallmarked in 2016 (date letter "r")

[Basic guide to gold purity and hallmarks](/knowledge/gold/gold-purity-hallmarks)

### 1. Sponsor's (Maker's) Mark

**Purpose:** Identifies who made or submitted the item for hallmarking.

**Characteristics:**
- Usually contains initials
- Enclosed in a shield shape
- Required by law
- Registered with assay office
- Unique to each maker

**Examples:**
- "JW" in a shield = John Wilson
- "AB" in a shield = Alice Brown  
- "TLC" in a shield = The London Company

**Historical Note:** In antique pieces, maker's marks help identify famous craftsmen and can significantly increase value beyond gold content.

> Maker's marks are most relevant for antique or designer jewellery. For modern scrap gold, they don't affect the melt value but can help identify if a piece might have collectible worth.

### 2. Fineness (Purity) Mark

**Purpose:** Indicates the gold content as parts per thousand.

**Common UK Gold Fineness Marks:**

| Mark | Carat | Percentage | Description |
|------|-------|------------|-------------|
| 375 | 9ct | 37.5% | Most common UK jewellery |
| 585 | 14ct | 58.5% | International standard |
| 750 | 18ct | 75% | Premium jewellery |
| 916 | 22ct | 91.6% | Traditional/investment |
| 999 | 24ct | 99.9% | Pure gold (bullion) |
| 990 | 24ct | 99% | Nearly pure |

**Additional Symbols:**
- Often accompanied by crown symbol (traditional)
- Some older items show "9CT", "18CT" instead of numbers
- May include purity symbol (varies by era)

**Reading the Number:**
- 750 = 750 parts per 1000 = 75% = 18ct
- 375 = 375 parts per 1000 = 37.5% = 9ct

### 3. Assay Office Mark

**Purpose:** Shows which of the UK's assay offices tested and marked the item.

**Current and Historical UK Assay Offices:**

**London - Leopard's Head**
- Oldest assay office (established 1300)
- Symbol: Leopard's head
- Still operating today
- Most common mark

**Birmingham - Anchor**
- Established 1773
- Symbol: Anchor
- Major industrial centre
- Very common on modern jewellery

**Sheffield - Rose (or Crown)**
- Established 1773
- Symbol: Rose or crown with "Sheffield"
- Known for silverware, also gold
- Common on cutlery

**Edinburgh - Castle**
- Established 1485
- Symbol: Three-towered castle
- Scottish items
- Less common than English marks

**Historical Offices (Closed):**
- Chester (closed 1962)
- Norwich (closed 1697)
- York (closed 1856)
- Exeter (closed 1883)
- Newcastle (closed 1884)

> Goldealers can identify items from any UK assay office, past or present. This helps us date and authenticate items, ensuring accurate valuations.

### 4. Date Letter (Optional on Modern Items)

**Purpose:** Indicates the year the item was hallmarked.

**How It Works:**
- Cycles through the alphabet
- Different typeface for each cycle
- Changes style when reaching Z
- Optional on items made after 1999
- Still used on some traditional items

**Reading Date Letters:**
- Complex system varying by office and era
- Each office had different cycles
- Capital vs lowercase indicates different periods
- Shape of shield changed with cycles

**Example Cycles:**
- 1975: lowercase "a" in one style
- 2000: uppercase "A" in different style
- 2016: lowercase "r"

**Why Less Common Now:**
- Made optional in 2000
- Cost savings for manufacturers
- Less relevant in modern times
- Some premium makers still use them

> Dating antique gold by date letters requires specialized knowledge. If you believe you have a valuable antique, consult an expert before selling for scrap value.

## Examples by Purity

Understanding what hallmarks look like for each purity helps identification.

### 9ct Gold Hallmarks

**Typical Mark:**
```
[Maker] [375] [Assay Office]
```

**Characteristics:**
- Most common UK jewellery purity
- Often has crown symbol
- May say "9CT" on older pieces
- Sometimes just number without crown

**Where Found:**
- Most high street jewellery
- Affordable pieces
- Everyday wear items
- Repairs often 9ct

### 18ct Gold Hallmarks

**Typical Mark:**
```
[Maker] [750] [Assay Office] [Date]
```

**Characteristics:**
- Premium jewellery standard
- Richer gold colour
- Often has more complete hallmark
- May include additional symbols

**Where Found:**
- Designer jewellery
- Engagement rings
- High-end pieces
- European imports

### 22ct Gold Hallmarks

**Typical Mark:**
```
[Maker] [916] [Assay Office]
```

**Characteristics:**
- Traditional and Asian jewellery
- Deeper yellow colour
- Less common in modern UK pieces
- Investment-grade purity

**Where Found:**
- Asian wedding jewellery
- Traditional pieces
- Some sovereign coins
- Antique jewellery

### 24ct Gold Hallmarks

**Typical Mark:**
```
[999] or [990] [Assay Office]
```

**Characteristics:**
- Nearly pure gold
- Usually bullion items
- Rare in jewellery (too soft)
- May have additional certification

**Where Found:**
- Bullion bars
- Investment coins
- Some religious items
- Rare custom pieces

## Hallmarks for Other Precious Metals

Gold isn't the only hallmarked metal - understanding related systems helps identification.

### Silver Hallmarks

**Key Differences:**
- Lion passant (walking lion) for sterling
- Britannia figure for 958 silver
- "925" for sterling
- Different fineness numbers

**Common Silver Marks:**
- 925 (sterling silver)
- 958 (Britannia silver)
- 800 (Continental silver)

[Complete guide to silver hallmarks](/knowledge/silver/understanding-silver-hallmarks)

### Platinum Hallmarks

**Characteristics:**
- "Plat" or platinum symbol
- 950, 900, or 850 fineness
- Orb symbol for pure platinum
- Similar structure to gold marks

### Palladium Hallmarks

**Notes:**
- Mandatory since 2010
- "Pd" or palladium symbol
- 950 or 500 fineness
- Less common than gold/silver

> Goldealers tests all metals regardless of hallmarks. If you have mixed precious metals, we'll identify and value each correctly.

## No Hallmark Scenarios

Not all gold items have hallmarks, and there are legitimate reasons why.

### Legal Exemptions

**Items Exempt from Hallmarking:**

**By Weight:**
- Gold items under 1 gram
- Silver items under 7.78 grams
- Platinum items under 0.5 grams
- Palladium items under 1 gram

**By Age:**
- Antiques made before 1950 (may still have hallmarks)
- Items predating hallmarking laws
- Foreign items not sold in UK

**By Type:**
- Dental gold (not sold as jewellery)
- Scrap metal for refining
- Items not marketed as precious metal

### Why Hallmarks Might Be Missing

**Legitimate Reasons:**
- Below weight threshold
- Imported from country without hallmarking
- Antique with worn-off marks
- Mark removed during repairs
- Custom-made piece not submitted
- Part of item where mark was located removed

[Can I sell gold that isn't hallmarked?](/knowledge/gold/can-sell-gold-not-hallmarked)

### Testing Unhallmarked Gold

**Goldealers' Approach:**
1. Visual inspection for any marks
2. XRF analysis for composition
3. Acid test verification if needed
4. Weight and density checks
5. Pay based on verified purity

**Customer Protection:**
- We don't rely on hallmarks alone
- All items professionally tested
- Accurate purity determination
- Fair payment for actual gold content

## International Hallmarks

Understanding foreign systems helps when dealing with imported jewellery.

### US Marking System

**Characteristics:**
- Uses "K" instead of "ct"
- Often just karat stamp (14K, 18K)
- No fineness number necessarily
- No assay office marks
- Maker's mark may be present

**Common US Marks:**
- 10K, 14K, 18K, 22K, 24K
- Sometimes with fineness (417, 585, 750)
- "Solid Gold" stamped on some items

### European System

**Characteristics:**
- Often shows fineness number only
- "585" without "14ct" designation
- Different assay marks per country
- May have eagle or other national symbols

**Common European Marks:**
- 333, 375, 585, 750
- National control marks vary
- Often includes maker's symbol

### Asian Jewellery Marks

**Characteristics:**
- May be in local language script
- Sometimes shows percentage (91.6%)
- Traditional symbols used
- Often no hallmark at all
- Higher purity common (22ct, 24ct)

**Common Scenarios:**
- Chinese gold: Often 999 or 24K marked
- Indian gold: 22ct common, may have Hindi marks
- Middle Eastern: Often high purity, varied marking

> Foreign jewellery may not follow UK hallmarking standards. Goldealers tests all items regardless of markings to verify actual gold content and provide accurate valuations.

## Fake or Misleading Hallmarks

Unfortunately, some items carry deceptive markings.

### Common Fake Marks

**Warning Signs:**

**Plated Items Marked:**
- "GP" = Gold Plated (NOT solid gold)
- "GF" = Gold Filled (NOT solid gold)
- "HGE" = Heavy Gold Electroplate
- "GEP" = Gold Electroplated
- "RGP" = Rolled Gold Plate

**Suspicious Characteristics:**
- Marks that rub off easily
- Unusual fineness numbers for gold (like 400, 800)
- No assay office mark on UK items >1g
- Misspellings or odd fonts
- Marks in obviously wrong places

**Costume Jewellery:**
- May say "18K" but actually plated
- "Gold-tone" or "Gold-color" items
- Fashion jewellery with misleading marks
- Base metal with gold appearance

### How Goldealers Protects You

**Our Verification Process:**

**Never Rely Solely on Hallmarks:**
1. Visual inspection of all markings
2. XRF testing for actual composition
3. Acid test verification when needed
4. Weight and density analysis
5. Magnet testing (gold isn't magnetic)

**Transparency:**
- If marks don't match actual content, we explain clearly
- Pay based on verified purity, not stamps
- Inform customers of discrepancies
- Educate about fake vs real marks

> Some costume jewellery is stamped "18K" but is actually just gold-plated brass or copper. Professional testing catches these fakes. Goldealers always verifies metal content regardless of what the stamps say.

## Historical Hallmark Styles

Antique gold often has different hallmarking styles.

### Victorian Era (1837-1901)

**Characteristics:**
- Elaborate maker's marks
- Detailed date letters
- Different shield shapes
- May include monarch's head (duty mark)
- Romantic and ornate styles

### Edwardian Era (1901-1910)

**Characteristics:**
- Delicate filigree common
- Platinum introduction
- Similar hallmarking to Victorian
- Often white gold or platinum look

### Art Deco (1920s-1930s)

**Characteristics:**
- Geometric designs
- Often white gold
- Clear, bold hallmarks
- May have continental influences

### Post-War (1945-Present)

**Characteristics:**
- Simplified marks
- More standardized
- Clearer fineness numbers
- Less decorative shields

> If you have antique gold jewellery, the hallmarks can help date and potentially identify valuable pieces. Goldealers can assist in recognizing significant antique marks.

## Frequently Asked Questions

**Q: What do the hallmark symbols on my gold jewellery mean?**  
A: UK gold hallmarks tell you who made the item, its gold purity, and where/when it was assayed. For example, "750" on a hallmark means the item is 18ct gold (75% pure). A symbol like a leopard's head indicates the London Assay Office. By reading these tiny stamps, you can confirm your gold's carat, maker, and origin.

**Q: Why does my gold have multiple stamps?**  
A: A complete hallmark contains 3-4 marks: the maker's mark (who made it), fineness mark (purity), assay office mark (where tested), and sometimes a date letter (year). Each provides different information about the item.

**Q: Can hallmarks be faked?**  
A: Yes, unfortunately some items have fake or misleading marks. This is why Goldealers always tests items professionally using XRF technology rather than relying solely on stamps.

**Q: What if my old gold has worn or unclear hallmarks?**  
A: Worn marks are common on antique or well-worn jewellery. Goldealers can still test and accurately value items with unclear or missing hallmarks using professional testing equipment.

**Q: Do all countries use the same hallmarking system?**  
A: No. The UK has one of the oldest and most detailed systems. Other countries may only stamp karat (like US) or have entirely different systems. Goldealers is experienced with all international marking styles.

## Next Steps

By mastering hallmark identification, you can confidently identify your gold's purity and origin at home. This knowledge helps you verify that quotes you receive align with your items' specifications.

**Useful Resources:**
- [Gold purity and hallmarks explained](/knowledge/gold/gold-purity-hallmarks)
- [Selling gold without hallmarks](/knowledge/gold/can-sell-gold-not-hallmarked)
- [How Goldealers tests gold purity](/knowledge/testing/how-is-gold-tested)

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*Published by Goldealers Ltd · https://goldealers.co.uk/knowledge/gold/understanding-gold-hallmarks-uk*