Primary service
Gold Testing & Assaying
Gold testing and assaying using analytical, screening and physical methods selected according to the material, sample requirements and intended use of the result.
Testing Services
Gold Testing & Assaying Services
Every testing requirement starts with a different question. Whether you need to confirm gold content, verify purity or screen a metallic or gold-bearing sample, we’ll recommend the most appropriate testing method based on your material, the level of accuracy required and how the results will be used.
Services
Choose the Right Service
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Additional service
Export Support Services
Support with laboratory reports, transaction documentation, and selected export requirements for eligible clients and qualifying transactions.
Available by appointment
Consultation Services
Discuss your material, testing requirements, laboratory results or trade enquiry with a member of our team before deciding on the next step.
Consultations may be conducted by phone, WhatsApp, video call, or in person, depending on the nature of the enquiry.
Gold Testing & Assaying
Testing Methods
Each method answers a different question. These groupings help clients find the relevant technique; they are not separate business divisions or a claim that every method suits every material.
Core Gold Determination
Rapid Elemental Screening
Instrumental Analysis
Specialized Gold Analysis
Bullion Authentication
Fire Assay by Cupellation
Fire Assay is widely regarded as the benchmark method for determining precious-metal content.
A small, representative portion of the material is prepared and heated under controlled laboratory conditions. This process separates the precious metals from other components, allowing the gold content to be accurately measured.
Fire Assay is typically recommended whenever a high degree of accuracy is required for valuation, refining, settlement or independent verification.
Suitable For
- Gold Ore
- Concentrates
- Refinery Samples
- Precious-Metal Analysis
Method Characteristics
- Laboratory-Based
- Uses Part of the Sample
- High Accuracy
- Precious-Metal Determination
X-Ray Fluorescence (XRF) Analysis
XRF analysis provides a fast reading of the elements detected on or near the surface of a metallic sample without damaging the material.
It is useful for rapid screening, routine verification, and situations where a client needs an initial composition reading before deciding whether further laboratory analysis is required.
Suitable For
- Gold Bars
- Bullion
- Metallic Samples
- Rapid Screening
Method Characteristics
- Non-Destructive
- Fast Results
- Elemental Analysis
- No Sample Consumption
Not Sure Which Method You Need?
Most clients do not need to select an analytical method before contacting us.
Tell us what you're trying to confirm and how the results will be used. We'll recommend the most appropriate testing approach based on your material and your requirements.
Methods Bilex May Discuss for Your Sample
| Your Objective | Recommended Method |
|---|---|
| Screen a sample quickly | XRF |
| Test without damaging the sample | XRF |
| Determine precious-metal content | Fire Assay |
| Measure multiple selected elements in a prepared sample | ICP-OES |
| Investigate selected elements at trace levels | ICP-MS |
| Address coarse-gold heterogeneity | Metallic-Screen Fire Assay |
| Examine internal bar continuity | Ultrasonic Testing |
| Assess physical mass-to-volume consistency | Density / Hydrostatic Testing |
Appointment
Tell us what you need to verify.
You do not need to select a testing method before contacting us.
During the initial review of your enquiry, we'll discuss your material, explain the available testing options and recommend the most appropriate next step.
If laboratory testing is appropriate, we'll explain the sample requirements, the expected process and how your material will be handled.
Knowledge Centre
Understand the testing process before making a decision.
Explore our guides to compare testing methods, understand laboratory results and prepare informed questions before requesting testing or discussing a transaction.
How Gold Assaying Works
Learn how a representative sample moves from preparation and analysis to a documented laboratory result.
Read the guideFire Assay vs XRF
Compare what each method measures, where its limitations lie and when the two methods may be used together.
Read the guideWhat Assay Results Mean
Understand fineness, percentage and karat values while recognising that an assay report forms only one part of a wider transaction review.
Read the guide