Why Independent DVI Testing Matters: Insights from JTR Reveal’s ASSURE 2.0 Results

Claims Are Easy. Proof Is Not.

Independent ASSURE 2.0 testing, not a manufacturer's own claim, is what proves a diamond screening device performs as advertised. Anyone can claim their device works. In today's diamond industry, transparency and trust rely on objective, science-based standards, and the Natural Diamond Council's ASSURE 2.0 Program exists to provide exactly that: an independent, rigorous benchmarking process for diamond verification instruments (DVIs) that levels the playing field for traders, jewelers, and customers. Here is why that distinction matters for everyone relying on a diamond verification device.

The Problem Independent Testing Solves

A diamond screening device is only as trustworthy as the evidence behind its claims. Manufacturers naturally want to present their own instruments in the best light, and a spec sheet written by the company selling the device is not the same thing as a result verified by a neutral third party. When the claim in question determines whether a customer is told, correctly, that they are buying a natural diamond rather than a lab-grown one, that gap between marketed performance and verified performance is not a minor detail. It is the entire point.

This is the problem the Natural Diamond Council (NDC) set out to solve with the ASSURE Program. Rather than asking the market to take manufacturer claims on faith, ASSURE puts diamond verification instruments through standardized, independent testing, using tough, future-proof test samples and procedures, and publishes the results openly, so that anyone buying a diamond screening device can compare instruments on the same terms.

What ASSURE 2.0 Actually Tests

ASSURE 2.0 is the current version of the NDC's testing protocol, run in partnership with independent testing laboratories, including GIA and HRD Antwerp. Instruments are evaluated against verified sample sets containing natural diamonds, synthetic diamonds, and diamond simulants, including deliberately challenging specimens designed to stress-test a device's limits rather than flatter them.

One detail sets ASSURE 2.0 apart from the original ASSURE program: testing is carried out by novice operators, not by the manufacturer's own trained staff. That single change matters enormously, because it measures what actually happens when a real jeweler, with real-world training rather than manufacturer-level expertise, uses the device on the sales floor or in the back office.

Each tested instrument is scored against three metrics:

• Diamond False Positive Rate, or how often a lab-grown or synthetic diamond is mistakenly cleared as natural. The optimal rate is 0%.
• Diamond Referral Rate, or how often a stone needs a second look rather than getting an immediate result. The optimal rate is also 0%, though some referral is expected and reasonable given how closely certain lab-grown diamonds can mimic natural fluorescence patterns.
• Diamond Accuracy Rate, the overall rate of correct classification, with an optimal rate of 100%.

Results are published in the public ASSURE Directory 2.0, giving buyers a transparent, apples-to-apples reference before they commit to a diamond verification device.

What ASSURE 2.0 Testing Means for Industry Stakeholders

• Traders & Retailers can confidently select the most accurate diamond verification instrument for their business, using real performance data rather than marketing claims. Results show which tools best protect inventory and reputation.
• Jewelers know their screening process meets leading industry standards, reassuring clients and supporting ethical sourcing.
• Customers gain peace of mind that purchased diamonds have been tested with a top-rated instrument, minimizing the risk of misidentification or fraud.

JTR REVEAL Results in ASSURE 2.0 Testing

JTR's diamond screening devices have been evaluated by ASSURE 2.0, posting some of the highest marks in the industry for accuracy, speed, and reliability.

Zero False Positives

Both the legacy device and the REVEAL Diamond Detector 2S recorded a 0.0% Diamond False Positive Rate, meaning neither ever misidentified a synthetic diamond as natural during ASSURE 2.0 testing. In practical terms, that is a 100% Lab-Grown detection rate for the REVEAL Diamond Detector 2S, verified by an independent third party rather than claimed by JTR itself.

High Accuracy

The REVEAL Diamond Detector 2S reaches up to 94.4% overall accuracy on primary loose stones, among the highest in the industry, reducing operational risk and supporting secure trading.

Fast Analysis

The REVEAL Diamond Detector 2S analyzes over 420 stones per hour, giving jewelers speed without sacrificing precision.

Broad Capabilities

The REVEAL Diamond Detector 2S screens both loose and mounted stones, with one of the largest analysis areas in its category, a meaningful advantage for practical, high-volume testing.

How REVEAL Devices Work

The REVEAL Diamond Detector 2S offers four diagnostic views, Daylight, Fluorescence, Phosphorescence, and Result, on both loose stones and finished jewelry. The operator receives semi-automated, image-based results, supported by color-coded visual cues for straightforward interpretation. Stones that need more expertise are automatically flagged for further review, so operator judgment and control are preserved throughout.

Independent Testing Is Part of a Larger Responsibility

The NDC frames this work as part of a broader concept it calls diamond pipeline integrity: the shared responsibility, at every point in the supply chain, to correctly disclose whether a diamond is natural or synthetic. Undisclosed lab-grown diamonds can enter the natural diamond market through supplier relationships, customer returns, contractor access, or simple internal handling errors, and the council is direct about the stakes. A business that unknowingly sells an undisclosed synthetic diamond is not just risking a customer relationship. It is risking commercial penalties and, in some cases, criminal liability.

Verified diamond screening technology is one of several safeguards the NDC recommends, alongside supplier warranties, counterparty due diligence, tamper-proof packaging, inventory tracking, and segregated workflows for natural and synthetic stones. But it is the safeguard that sits closest to the point of sale, which is exactly why the instrument doing that job needs to be independently verified rather than self-certified.

Real-World Impact

Independent, ASSURE 2.0-certified results empower every link in the diamond supply chain:

• Jewelers and traders rely on genuine data when comparing devices for their needs.
• Customers benefit from more secure, verified purchases.
• Innovation is encouraged, driving continual improvement and wider adoption of best practices.

The Takeaway

Diamond verification technology only does its job if the people relying on it can trust the numbers behind it. The ASSURE 2.0 program gives the industry a shared, independent standard for that trust, tested the way these instruments are actually used, by real operators, against real challenging stones, with results anyone can check. Detailed, third-party testing confirms the REVEAL Diamond Detector 2S as an industry leader in diamond verification, helping everyone in the trade make smarter, safer choices. Before choosing a diamond screening device or diamond detecting instrument for a store, workshop, or lab, checking its ASSURE 2.0 results is not an extra step. It is the step that turns a manufacturer's claim into a verified fact.