Dubai’s international reputation as the "City of Gold" is underpinned by strict regulatory oversight, mandatory hallmarking laws, and advanced non-destructive assay technologies enforced across the Dubai Gold Souq and institutional dealing desks.
1. Non-Destructive X-Ray Fluorescence (XRF) Spectrometry
Professional bullion houses in Dubai, including Mari Gold Star, utilize benchtop XRF analyzers. This technology emits controlled X-rays that excite the atoms on the metal surface, generating secondary fluorescent radiation that measures exact elemental composition (gold purity down to 0.01% precision) within seconds without scratching or damaging the bullion.
2. Ultrasonic Velocity & Density Verification
To verify the internal core of thick cast bars (such as 1 Kilo and 100g bars) without cutting the metal, ultrasonic thickness gauges measure the speed of sound passing through the gold (approximately 3,240 m/s for pure 24K gold). Any foreign core (such as tungsten) immediately disrupts the acoustic frequency.
3. Dubai Central Laboratory (DCL) Hallmarking
The Dubai Municipality Consumer Protection Department and DCL enforce mandatory random testing and certification across all registered gold traders in the emirate. Genuine bullion items bear official refinery stamps, fineness marks (e.g. 999.9), weight, and unique serial numbers.
4. Tamper-Evident CertiCard Packaging
Minted small bars (1g to 100g) are hermetically sealed in protective credit-card sized CertiCards. If the seal is compromised, a visible security pattern or holographic mark appears, guaranteeing chain-of-custody integrity.