Why Every Gold Investor in Dubai Is One Tungsten Bar Away From Losing Their Wealth
By Telos Instruments | Exclusive Sigma Metalytics Distributor in the GCC | Dubai, UAE
Sigma Metalytics PMV Investor — The only portable tool that detects tungsten-core gold bars
You bought a gold bar in Dubai. It has the hallmark — stamped by Dubai Central Laboratory. The assay card looks perfect. It came from a reputable dealer. You verified the weight on your scale. Everything checks out. But inside that bar, underneath the outer layer of genuine gold, is tungsten. You do not know this yet. The bar sits in your safe. You think your wealth is protected. It is not. This is not a hypothetical risk. Tungsten-core gold bars have been discovered in circulation in Dubai and major financial centres globally.
Tungsten has a density of 19.25 g/cm³. Gold has a density of 19.30 g/cm³. The difference is 0.26%. A genuine 1 kg gold bar measures approximately 55mm × 31mm × 10mm and weighs exactly 1,000 grams. A fraudulent 1 kg bar with a tungsten core and a gold outer layer will also weigh approximately 1,000 grams. The dimensions will be almost identical. When you hold it, it feels the same. When you put it on a scale, it weighs the same. The only difference is inside — where no standard verification method can reach.
Genuine — But Irrelevant
The Dubai Central Laboratory stamp is genuine. But the fraud starts with a genuine bar, cuts it open, inserts tungsten, and re-seals it. The hallmark remains valid. It tells you nothing about the current interior.
Perfectly Matched
Because tungsten density is 99.7% identical to gold’s, a scale cannot distinguish a tungsten-core bar from solid gold. Both register the correct weight within any practical margin of error.
Surface Only
XRF X-rays penetrate only 10-50 micrometers. For a bar with 2-3mm gold outer layer, XRF reads only the genuine gold surface. The tungsten core is completely invisible. XRF can say “24K gold” — and the bar can still be tungsten-core.
Measures Only the Surface
Acid testing measures the chemical reaction of the surface layer. If the outer 1mm is genuine gold, the acid test confirms it is gold. The tungsten core is never tested. Plus, acid testing leaves permanent marks on your bars.
2012 Manhattan Federal Reserve Gold Audit: During a Federal Reserve audit of gold holdings, tungsten-core gold bars were discovered in a shipment held for decades. The bars were genuine in every surface aspect — except for the tungsten cores hidden inside.
2013 London Bullion Market Discovery: XRF testing revealed tungsten-core bars circulating in what was supposed to be one of the world’s most secure precious metals markets. The LBMA subsequently upgraded verification procedures.
GCC Precious Metals Market Reports (2015–2025): Industry publications have documented instances of tungsten-core bars discovered in Dubai, Abu Dhabi, and other regional markets — bars that had passed multiple verification checks before detection.
A 1 kg gold bar at current prices represents a significant purchase amount. A tungsten bar looks identical, weighs the same, has the same hallmark and assay card. When you buy it at current gold prices, you pay market rate. When you later try to sell it, the moment the buyer tests it with any depth-penetrating method, the fraud is revealed. The bar is worthless. That is not an investment loss or a market fluctuation. That is the complete destruction of that amount in purchasing power. For an investor with a portfolio of bars, if even one is tungsten-core, the loss is severe.
| Method | Tungsten Detection? | Destructive? | Home-Based? | Tests Full Depth? |
|---|---|---|---|---|
| Fire Assay (Lab) | ✓ Yes | ✓ Yes (bar destroyed) | ❌ No | ✓ Yes |
| XRF Analysis | ❌ No | ❌ No | ❌ No (lab/service) | ❌ No (surface only) |
| Acid Testing | ❌ No | ✓ Yes (marks bar) | ✓ Yes | ❌ No (surface only) |
| Density Testing | ❌ No (0.26% difference) | ❌ No | ✓ Yes | ❌ No (indirect) |
| Sigma Metalytics PMV Investor | ✓ Yes | ❌ No | ✓ Yes | ✓ Yes (through-depth) |
Every metal has a unique electrical resistivity — a fundamental physical property as distinctive as a fingerprint. The Sigma Metalytics PMV Investor generates a calibrated electromagnetic field that passes completely through the bar — surface to core — and measures the resistivity of the entire metal column. Gold has one resistivity value. Tungsten has a completely different one. A tungsten core cannot hide. The field reaches it, detects it instantly, and the test fails. This is the technology trusted by The Perth Mint, central bank auditors, and thousands of professional dealers worldwide.
Through-Depth Authentication
- Patented electromagnetic resistivity testing — reads full bar depth
- Detects tungsten cores that pass all surface tests
- Non-destructive — your bars remain in pristine condition
- Tests through sealed LBMA packaging — never open assay cards
- Trusted by The Perth Mint and central bank auditors
- Fast results — complete verification in under 2 minutes per bar
For Coins & Smaller Items
Surface and shallow-depth electromagnetic testing. Ideal for gold and silver coins. For bar investors concerned about tungsten cores, the PMV Investor is the recommended model.
View PMV Original →✅ Genuine Sigma Metalytics
Full manufacturer warranty. The Sigma Metalytics Gold Standard Promise included.
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We bring the PMV to your home — test your own bars before purchase.
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How do I know if a bar I already own is tungsten-core?
The only way to know is to test it using Sigma Metalytics electromagnetic resistivity testing. Visual inspection, weight, hallmarks, assay cards, XRF testing — none of these will reliably detect a tungsten core.
Can a tungsten-core bar be detected by any method besides Sigma Metalytics?
Not reliably. Fire assay will detect it, but only after your bar is destroyed. Density testing fails because tungsten density is 99.7% identical to gold’s. XRF fails because it only tests the surface. No other portable method reliably detects tungsten cores.
Can the Sigma Metalytics PMV Investor test bars in sealed LBMA packaging?
Yes. The electromagnetic field passes through plastic packaging without any need to open it. Your sealed assay cards are never opened. The sealed condition that supports resale value is completely preserved.
Is Sigma Metalytics testing expensive to maintain?
The PMV Investor is a one-time purchase. There are no per-test costs, no monthly fees. Once purchased, it tests unlimited bars for life.
If my bar fails the test, what do I do?
Confirm the result by testing a second time. If consistent, contact the dealer who sold you the bar with your verification documentation. Do not attempt to resell the bar without disclosure.
Where do I get Sigma Metalytics testing in Dubai?
Telos Instruments is the exclusive authorized GCC distributor. Contact us for a free personal demonstration at your home or office.
Don’t let a tungsten bar destroy your wealth.
Sigma Metalytics PMV Investor — the only portable tool that detects tungsten cores. Available now from Telos Instruments, Dubai.
Serving gold investors in Dubai, Abu Dhabi, Riyadh, Doha, Kuwait City, Manama, Muscat