Official Au750 Hallmark Hallmark & Fischer XRF Spectrometry Verification
Non-Destructive Fischer XRF Au750 & Pt950 Spectrometry Protocol
Every precious-metal timepiece curated by 18K SOLID GOLD undergoes three-point non-destructive X-Ray Fluorescence (XRF) spectroscopy across the monobloc middle case, bezel ring, and deployant clasp links. Our Fischer XRF instrument verifies an elemental composition of 75.0% pure gold Au750 balanced with silver, copper, and palladium/platinum for 18K yellow, rose, Everose, and white gold references, or 95.0% pure platinum (Pt950) for platinum editions.
Mettler-Toledo Gravimetric Mass Verification (33.2g to 282.5g)
Because 18-karat gold possesses a specific gravity of 15.5 g/cm3 and 950 platinum reaches 21.45 g/cm3, physical mass on a calibrated 0.01g Mettler-Toledo analytical balance is the ultimate proof of solid precious-metal construction. Prior to dispatch, every client receives a personalized 4K video recording the exact gram weight, XRF spectrum trace, and 6-position Witschi Chronoscope rate.
Every creation presented by 18K SOLID GOLD is forged in solid 18-Karat Gold (Au750) or 950 Platinum to achieve 1:1 gravimetric parity with its Geneva reference (up to 282.4 grams), verified on 4K video via Fischer XRF spectroscopy and a Mettler-Toledo analytical balance.
How does Fischer XRF spectroscopy verify 18K solid gold without scratching the watch?
X-Ray Fluorescence excites secondary atomic X-rays from the alloy surface and reads the exact elemental percentages of Gold (Au 75.0%), Silver (Ag), Copper (Cu), and Palladium (Pd) in seconds with zero physical contact or abrasion.
Why is Mettler-Toledo gram weighing performed alongside XRF testing?
Combining XRF surface spectroscopy with full-watch gravimetric weighing (for example, 207.0g for a solid 18K Daytona or 282.5g for a 950 Platinum Daytona) confirms that the entire case and bracelet core are solid precious metal.
Do I receive the 4K XRF and scale video of my exact timepiece before shipping?
Yes. Before your shipment is sealed, our laboratory transmits a personalized 4K video showing your specific timepiece on the Mettler-Toledo balance, Fischer XRF chamber, and Witschi Chronoscope.