Tools & Technology for Authentication at Home

Building Your Toolkit

A modest investment in the right tools catches the vast majority of counterfeits.

Essential Tools (Under $75)

• 10x triplet loupe ($15–$40) — The most important tool. Hastings triplet or BelOMO 10x.
• Digital scale ($15–$25) — Accurate to 0.01g. AWS or Smart Weigh brands.
• Digital calipers ($10–$20) — Measure to 0.01mm.
• Rare earth magnet ($5–$10) — Identifies iron/steel-core fakes instantly.

Intermediate ($75–$300)

• USB microscope ($30–$80) — 50x–200x with camera. Excellent for surface examination.
• Fisch detector ($50–$200) — Tests diameter, thickness, weight, reeding in seconds. Great for coin shows.
• Sigma Verifier ($250+) — Electromagnetic composition testing through holders. Gold standard for bullion.

Systematic Authentication Process

1. Visual inspection — does anything feel "off"?
2. Magnet test — any attraction = fake (for US coins).
3. Weight — compare to published specifications.
4. Diameter — should match within 0.2mm.
5. Magnification — check for porosity, seam lines, tooling.
6. Edge examination — reeding count and quality.
7. Sound test — for silver coins.
8. If uncertain — submit to PCGS or NGC.

Up Next

When to Use a Professional Authentication Service.