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HOUSE OF KACINARI · Veritas supra omnia.
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Learn · Lesson 23

Screening, Devices, and Digital Fraud

HOK-DIA-LESSON-00023Time-sensitive

Learning Objectives

Core

A handheld property tester and a Diamond Verification Instrument (DVI) are not the same category. Screening systems may return labels such as PASS, REFER, DETECT, or OUT-OF-RANGE, but each label has meaning only under the documentation for that particular device, version, sample configuration, and validated population.

OUT-OF-RANGE is a device-result label where the device documentation defines it. OUT OF SCOPE is not a synonym for that result. OUT OF SCOPE describes a boundary of validated applicability: a sample, configuration, or use case is outside what the method has been validated to support.

REFER is not a synonym for laboratory-grown. It means that screening did not justify ending the workflow and another step is required.

Apply

Screening exists to separate samples that can move forward under a defined filter from those that require additional analysis. Referral rate, false-positive rate, accuracy, and real-world prevalence are different quantities. Performance on a standardized challenge set such as ASSURE can characterize a device under that protocol; it should not be converted into a claim about the market prevalence of laboratory-grown diamonds.

Throughput is processing speed, not accuracy. Loose, mounted, and melee material can require separately validated procedures. For operational use, document the device and version, validated scope, serial number or calibration status where relevant, result, and predefined next step.

Digital fraud creates a separate evidentiary problem. An authentic report number can exist while a listing or physical stone does not match the record. A copied PDF, synthetic image, screenshot, QR code, borrowed photograph, near-match dimensions, or counterfeit inscription cannot replace independent verification. Treat these as separate questions: Does the official record exist? Is the document authentic? Does the physical stone match that record?

For a high-consequence transaction, confirm the official laboratory record through the laboratory’s own channel, then establish the physical match using as many independent characteristics as practical. Escalate any inconsistency to independent laboratory examination rather than improvising a verdict from a digital artifact.

Check Your Understanding

Conclusion Boundary

Escalate every REFER or OUT-OF-RANGE device result according to the next method specified by the workflow. If a sample or use case is OUT OF SCOPE, do not reinterpret that condition as a device result; stop applying the unsupported method and move to an appropriately validated procedure. When digital fraud is suspected, verify the original record independently and then verify the physical match. A PDF, screenshot, QR code, or inscription alone proves neither authenticity nor identity.

Common Mistakes

“REFER means synthetic.”
No.

“OUT-OF-RANGE and OUT OF SCOPE mean the same thing.”
No. One can be a defined device outcome; the other is a validation/applicability boundary.

“0% false positives means the device can never be wrong.”
Not beyond the specific tested protocol and population.

“The report exists online, so this must be the stone.”
No. The record and physical match are separate evidentiary layers.

Remember

Screening is triage. Keep device output + validated scope + official record + physical match + exception handling distinct at every step.

Sources

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