The various methods to check the category of the testing machine:
a) Look for the Machine Design and Label
Both Spectrometers and XRF Testers are usually desktop devices - compact, box-shaped, and often placed on a sturdy counter.
- They typically have a small chamber or lid where the gold ornament is placed for testing.
- The front or side panel will have a manufacturer label or model name, for example:
- "Olympus DELTA XRF Analyzer"
- "Thermo Scientific Niton XRF"
- "Bruker S1 TITAN"
- "Spectro Midex"
- "FISCHERSCOPE XAN"
If you see "XRF," "Spectro," "Fluorescence Analyzer," or "Spectrometer" written on the body or screen - it's a good sign you're looking at a scientific-grade purity testing machine.
b) Ask the Valuer or Branch Staff
Don't hesitate to ask: "Can you please tell me which testing method or machine is being used - is it an XRF or spectrometer?"
A transparent financial institution or gold loan company will immediately show or explain the device and even share a printout or digital report generated by the machine. If they seem hesitant or say they use "acid testing" or "manual rubbing," that's not a modern or reliable method.
c) Avoid "Acid Test" or "Touchstone" Methods
Older methods involve:
- Scraping gold on a black stone (touchstone)
- Applying acid drops to test purity
These methods are not accurate, can damage the ornament, and are not allowed by most RBI-compliant NBFCs anymore. Always prefer non-destructive testing (NDT) — which XRF and Spectrometer machines provide.
d) Ask for a Purity Test Printout
A real XRF or spectrometer machine gives a digital report or printout slip that includes:
- The karat value (e.g., 22K, 18K, 24K)
- Composition breakdown (like percentage of gold, silver, copper, etc.)
- Timestamp and device ID / serial number
This is proof that a genuine electronic purity test was conducted.
e) Observe the Process
- The ornament is placed inside a closed testing chamber or under a small scanner window.
- A light or beam flashes for a few seconds (this is the X-ray or laser).
- The reading appears on a digital display or computer screen.
- The entire process takes less than a minute and does not scratch or harm the ornament.