Kalsten | Diamond Tester - High Accuracy Jewelry Diamond Tester for Novice and Expert
Diamond Tester: High-Accuracy Jewelry Testing for Experts and Novices
Are you concerned about accurately and conveniently verifying the authenticity of diamonds? Whether you're a novice or an experienced jeweler, this diamond tester is designed to deliver precise results. With high sensitivity and precision, it eliminates misidentification concerns, ensuring confidence in every test. This tester is an essential tool for jewelry collectors and professionals looking to confirm diamond authenticity without requiring specialized training or equipment.

With its advanced sensitivity and quick testing process, this diamond tester easily distinguishes diamonds from other stones with accuracy. It provides instant results through an audible alert and a clear, easy-to-read LED display, removing the guesswork from gemstone evaluation. Its compact and lightweight design makes it perfect for use at home, in a professional setting, or while traveling.

How to Apply:
Turn on the Diamond Tester and allow it to warm up before use. Ensure the probe tip is stable, then place it gently on the stone’s surface and wait for the reading. The LED display will indicate whether the stone is authentic, with an additional audio alert for confirmation. For the best results, follow the included calibration and handling instructions.

Included in the Package:
- One Diamond Tester
- One Secure Carry Case
- One User Manual
- One Calibration Instrument
Details:
- Material: Sturdy plastic body
- Dimensions: 6 x 1 x 2 inches
- Power Source: One 9V battery (not included)
- Compatibility: Ideal for evaluating gemstones, including diamonds
- Display: LED screen with audible result alerts
Free standard shipping on all orders. No minimum purchase.
- Ships to: United States
- Processing: 1–4 business days (Mon–Fri)
- Transit: 5–10 business days
- Total delivery time: 6–14 business days
- Order cut-off: 5:00 PM PST
You will receive a tracking number by email once your order ships. Please allow up to 48 hours for tracking to update.
See our full Shipping Policy.
You have 14 days from delivery to request a return.
- Email support@open.shop with your order number to start a return.
- Items must be unused, complete, and in their original packaging.
- Return label: flat $9.99 USD, deducted from your refund — nothing to pay upfront.
- Damaged, defective or incorrect items: we cover all return and replacement costs.
- No restocking fees.
- Exchanges: contact us and mention "exchange" — the new item ships once your return arrives.
- Refunds are issued within 7 business days of inspection.
See our full Return Policy.
Questions about your order or our products? We're happy to help.
Open
Hooizolder 214
Drachten Friesland 9205CD
Netherlands
Email: support@open.shop
Customer Service:
Monday to Friday, 8:00 AM – 6:00 PM PST (excluding public holidays)
We reply to all messages within 24 hours on business days. Weekend messages are answered on Monday.
For quick answers, visit our FAQ page or use our Contact Form.