Understanding professional methods and techniques for accurate gold valuation
Professional gold valuation involves multiple factors:
- Metal testing in-house to confirm the carat
- Hallmark verification and authentication
- Market price consideration
- Historical and artistic value assessment
- Condition and rarity evaluation
Understanding Gold Purity
Gold purity is measured in carats (ct) or millesimal fineness:
| Carat | Millesimal Fineness | Percentage Pure | Common Uses |
|---|---|---|---|
| 24ct | 999 | 99.9% | Investment bars, some cultural jewelry |
| 22ct | 916 | 91.6% | Asian jewelry, sovereigns |
| 18ct | 750 | 75.0% | High-end jewelry |
| 14ct | 585 | 58.5% | American jewelry |
| 9ct | 375 | 37.5% | British jewelry |
Professional Testing Methods
How we check the metal
We check the metal in-house before we make any offer:
- Non-destructive checks first
- Confirms the carat of the gold
- Shows when an item is only plated
Traditional Testing Methods
- Acid Testing: Accuracy ±1-2 carats
- Touchstone Testing: Requires skilled interpretation
- Electronic Testing: Surface reading only
- Specific Gravity Testing: Time-consuming but accurate
How Gold Is Valued
The value of a gold item starts with its purity and the gold market on the day, but condition, craftsmanship, the maker, the period and any gemstones often matter more, especially for antique, signed or gem-set jewellery. That is why we never quote figures without seeing the piece.
For an accurate, no-obligation figure, ask for a free valuation, subject to inspection and confirmation of condition and overall quality.
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Get Your Free ValuationUnderstanding Hallmarks
British hallmarks contain four main components:
- Sponsor's Mark: Identifies the manufacturer
- Standard Mark: Indicates purity (e.g., 375, 750)
- Assay Office Mark: Shows where tested
- Date Letter: Year of hallmarking
| Assay Office | Mark | Operating Since |
|---|---|---|
| London | Leopard's Head | 1300 |
| Birmingham | Anchor | 1773 |
| Sheffield | Rose | 1773 |
| Edinburgh | Castle | 1457 |
Additional Value Factors
Historical Value
- Age: Pre-1950s pieces often command premiums
- Provenance: Documented history increases value
- Maker's Marks: Prestigious makers add significant value
- Historical Significance: Connection to events or persons
Craftsmanship Value
- Hand-crafted vs Machine-made assessment
- Quality of gemstone settings
- Complexity of design
- Restoration history
Market Factors
- Current fashion trends
- Collector demand
- Rarity in the market
- Regional preferences
Common Valuation Mistakes
Professional valuers often encounter these common misconceptions:
- Assuming all yellow metal is gold
- Misreading hallmarks
- Overlooking historical significance
- Relying solely on weight
- Not considering maker's marks
Our Professional Valuation Process
At Mozeris Fine Antiques, we employ a comprehensive approach:
- Initial visual and physical examination
- Metal testing in-house to confirm the carat
- Hallmark verification under magnification
- Historical research when relevant
- Market analysis for similar items
- Documentation of findings
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Receive a detailed professional valuation with the metal tested in-house and expert analysis.
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