Description
High-Sulphidation Epithermal Ag-Cu-Au Ore CRM for XRF Verification & QA/QC
The Alloy Geek Epithermal Silver-Copper-Gold Ore Certified Reference Material – 50.4 ppm Ag is a certified, multi-element geological reference material designed for verification, validation, and routine quality control of handheld and benchtop XRF spectrometers.
This CRM represents a high-sulphidation epithermal ore matrix containing silver, copper, and gold in a siliceous, sulphide-bearing host. It is ideal for users who require matrix-matched verification for precious-metal ores rather than synthetic or oxide-based standards, particularly in exploration, mining, and geochemical XRF workflows.
Certified Silver Concentration
- Silver (Ag): 50.4 ppm
- Gold (Au): 0.817 ppm
- Copper (Cu): 1070 ppm
- Certified via multi-laboratory consensus using four-acid and aqua regia digestion methods
- Suitable for low-to-mid range silver, copper, and gold verification in complex epithermal ore matrices
This concentration is ideal for:
- Low-level silver verification in ore-grade materials
- Bridging sub-ppm and higher-grade silver CRMs
- Drift monitoring and repeatability checks for Ag, Cu, & Au methods
Typical Chemical Composition (Selected Major & Pathfinder Elements)
This CRM is a silica-rich, sulphide-bearing epithermal ore, representative of precious-metal systems encountered in real exploration and mining environments.
| Element | Certified Value |
|---|---|
| Silver (Ag) | 50.4 ppm |
| Gold (Au) | ~0.82 ppm |
| Copper (Cu) | ~0.107 wt.% |
| Iron (Fe) | ~2.4 wt.% |
| Sulphur (S) | ~1.0 wt.% |
| Arsenic (As) | ~680 ppm |
| Lead (Pb) | ~980 ppm |
| Zinc (Zn) | ~970 ppm |
A wide suite of additional trace and rare-earth elements is characterized, making this CRM highly valuable for multi-element XRF verification and interference assessment
Designed for XRF Applications
✔ Handheld XRF Analyzers
- Verification of silver, copper, & gold response at ore-grade levels
- Field QA/QC checks during exploration and sampling
- Drift and repeatability monitoring in siliceous matrices
✔ Benchtop & Laboratory XRF Systems
- Method development for precious-metal ores
- QA/QC control charting
- Instrument-to-instrument comparison
- Analyst training and proficiency testing
Because this is a natural epithermal ore, its XRF response closely matches real field and laboratory samples.
Physical Form & Preparation
- Finely milled, homogeneous geological powder
- Siliceous, sulphide-bearing epithermal ore matrix
- Suitable for loose powder analysis, sample cups, or pressed pellets
- Excellent repeatability when handled according to standard XRF SOPs
Why Use an Alloy Geek Certified Reference Material?
- Real-world epithermal ore matrix
- Certified silver at exploration-relevant concentrations
- Independently certified multi-element chemistry
- High homogeneity for repeatable results
- Optimized for both handheld and benchtop XRF analyzers
This CRM is an excellent low-Ag companion material within a broader silver QA/QC ladder.
Typical Use Cases
- Silver-gold-copper exploration programs
- Epithermal ore characterization
- XRF method development and validation
- QA/QC monitoring for precious-metal analysis
- Analyst training and proficiency testing
Important Handling & Storage Notes
- Fine powder – avoid inhalation and use appropriate PPE
- Store sealed in a cool, dry environment
- Sulphide-bearing material; minimize prolonged exposure to moisture and air
What’s Included
- Alloy Geek Silver Ore Certified Reference Material – 50.4 ppm Ag
- Certificate of Analysis (COA) with full certified chemistry