Description
High Accuracy Jewelry Diamond Tester for Novice and Expert, Gemstone Tester, Jeweler Tools
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Confirms every stone instantly: the audible alert and clear LED reading remove the guesswork of manual checks
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No training required: from first-time buyers to working jewelers, results come with equal confidence
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Test anywhere you need to: its small, lightweight body works at home, at the counter, or on the go
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Steady contact, reliable reading: hold the probe tip stable on the stone's surface for a consistent result
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Ready straight out of the case: a secure carry case and calibration instrument come with it for accurate testing
Worried about paying for a diamond that isn't real, or second-guessing a stone already in your collection? This diamond tester takes the guesswork out of the question: hold the probe against the surface, wait for the reading, and the audible alert plus a clear LED display tell you what you're looking at, with the same great sensitivity whether you're a novice or an experienced jeweler.

As a compact gemstone tester and diamond tester pen, it works by warming up for a moment before you place the probe tip on the stone; the quick, easy testing procedure then gives an instant result with no specialized equipment needed. It makes a useful precious stone tester, gem tester, and diamond testing tool for any jewelry collection, and among handy jewelry tools it stands out for what comes in the box: a secure carry case, a user manual, and a calibration instrument, so every reading stays accurate.
Why choose Tuzwa
Diamond Tester
| Feature |
Tuzwa |
Others |
| Audible alert confirms every reading |
✓ |
Visual only |
| Works the same for novice and expert |
✓ |
Trickier |
| Compact enough for home, work, or travel |
✓ |
Bulky |
| Comes with a calibration instrument |
✓ |
Extra cost |
| Includes a secure carry case |
✓ |
Varies |
| 30-day easy returns |
✓ |
Varies |
Key Features
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Portable Size: its small, lightweight body lets you test at home, at work, or on the go

Specifications
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Material: Sturdy plastic body
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Measurements: 6 x 1 x 2 in (15.2 x 2.5 x 5.1 cm).
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Compatibility: Ideal for evaluating gemstones, including diamonds
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Power Source: One 9V battery (not included)
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Display: LED display with audible results alert
Package Includes:
- One Diamond Tester
- One secure carry case
- One User Manual
- One Calibration Instrument
How to Use
- Switch the tester on and give it a moment to warm up before you begin testing.
- Keep the probe tip steady as you place it against the stone's surface.
- Wait for the result — the audible alert and LED display together confirm whether the stone is genuine.
- Follow the included calibration and handling guidelines for the most accurate results.

Right for you if
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✓You're new to testing diamonds — an audible alert and LED display confirm results without guesswork
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✓You test stones on the move — the small, lightweight body works at home, work, or on the go
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✓You want repeatable accuracy — calibration and handling guidelines are included with the tester
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✓You're building a jewelry testing kit — it comes with a secure carry case and calibration instrument
If two or more of these sound like you, this is the one.
FAQs
Q: How accurate is this diamond tester?
A: It's built for high accuracy, giving a clear LED reading backed by an audible alert on every test.
Q: Do I need experience to use it?
A: No, it's made for novice and expert use alike, with a quick, straightforward testing procedure.
Q: What comes in the box?
A: A secure carry case, a printed user manual, and a calibration instrument come in the box, alongside the diamond tester itself.
Q: What powers the tester?
A: One 9V battery, not included, powers the unit.
Q: Can it test other gemstones besides diamonds?
A: Yes, it's built for evaluating gemstones generally, including diamonds.