What is a diamond tester and how does it work?

A diamond tester is a handheld device used to determine whether a gemstone is a diamond or a simulant like cubic zirconia. It works by measuring the thermal conductivity of the stone; diamonds conduct heat differently from other materials. When you place the tester's probe on the stone, it produces a visual or audible signal indicating whether the stone is a real diamond. This tool is essential for jewelers, gemologists, and anyone interested in verifying the authenticity of their jewelry.

Can a diamond tester detect all types of diamonds?

Most diamond testers are designed to identify natural diamonds effectively, but their ability to detect fancy diamonds or diamonds with unusual inclusions can vary. Some testers might also misidentify moissanite as a diamond due to similar thermal properties. Therefore, while a professional diamond tester is highly reliable, it's advisable for users to familiarize themselves with the specific model's capabilities and consider using multiple testing methods for the utmost accuracy.

How accurate are diamond testers?

Diamond testers typically offer high accuracy, often exceeding 90% for detecting genuine diamonds. However, accuracy can vary based on the model and the stone being tested. Factors such as temperature and surface conditions can also affect readings. For the best results, it's recommended to follow the manufacturer's instructions carefully and use the tester in optimal conditions. For instance, jewelers often run multiple tests to ensure the authenticity of high-value gemstones.

Is a diamond tester portable?

Yes, most diamond testers are designed to be portable and handheld, making them easy to carry and use in various settings. Their compact size allows for convenient storage in a toolbox or jewelry kit, perfect for both professional jewelers and individuals assessing their collections at home. Many users find these portable testers beneficial when attending gem shows or traveling, ensuring they can verify their stones on the go.

How do you properly use a diamond tester?

To use a diamond tester, start by ensuring the device is calibrated correctly. Place the probe directly against the stone’s surface and activate the tester. Observe the results displayed on the meter or listen for an audio signal. It's important to test multiple areas of the stone for consistent results. If significant discrepancies appear, consider rechecking for optimal accuracy. This method is especially useful in purchasing scenarios, where verifying gemstone authenticity is crucial.

What types of stones can be tested with a diamond tester?

While diamond testers primarily assess diamonds, many models can also evaluate stones such as moissanite, glass, and cubic zirconia. However, the results may vary; for example, some testers may misidentify moissanite due to its similar thermal properties. Understanding the limitations of your device can help you make informed decisions. Utilizing a diamond tester alongside other verification methods can provide a more comprehensive evaluation of your stones.

Are there different types of diamond testers available?

Yes, there are various types of diamond testers, including thermal conductivity testers, electronic testers, and some that function with both thermal and electrical methods. Each type has its own set of features and reliability. For instance, thermal testers are widely used due to their simplicity, while electronic models may offer more advanced technology for detecting a broader range of stones. Choosing between these depends on your specific testing needs and usage frequency.

Do diamond testers require maintenance?

Diamond testers do require some basic maintenance to ensure optimal performance. Regularly check the batteries and replace them as necessary. It’s also essential to keep the probe clean to avoid residue affecting the readings. If the tester features a calibration option, perform periodic calibrations as recommended. These steps help maintain accuracy and extend the lifespan of your device, especially under frequent use in professional settings.

What should I look for when buying a diamond tester?

When purchasing a diamond tester, consider features like calibration methods, battery life, measurement accuracy, and specific capabilities to identify different gemstones. Look for user-friendly designs and clear display options, as these enhance usability, especially for beginners. Reading customer reviews and ratings can also provide insights into a product's reliability. A quality tester can be a valuable investment for both casual jewelry enthusiasts and professional jewelers seeking assurance in their transactions.

Where can I buy a diamond tester in South Africa?

You can purchase a diamond tester, including models like the Professional Diamond Selector and Portable Handheld Diamond Tester, from Ubuy in South Africa. Ubuy offers a wide selection of jewelry testing tools that cater to different needs, ensuring you find the right diamond tester for your requirements. With a focus on quality and customer satisfaction, Ubuy is a reliable choice for acquiring professional-grade diamond testing equipment.

Is Diamond Tester, Diamond Jewelry Tester, Professional Available to Shop Online in South Africa?

Yes, at Ubuy South Africa this product is available for you to shop at a reasonable price. The Diamond Tester, Diamond Jewelry Tester, Professional is not available locally but you can trust us with our express shipping services.

How Long Does It Take to Get Product After Placing the Order?

The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

goodstumbler

Diamond Tester, Diamond Jewelry Tester, Professional Diamond Selector, Professional Diamond Tester, Diamond Tester Tool Portable Handheld

Quickly differentiate between genuine diamonds and common imitations like cubic zirconia or moissanite.

goodstumbler

Item #: 183951929

Diamond Tester, Diamond Jewelry Tester, Professional Diamond Selector, Professional Diamond Tester, Diamond Tester Tool Portable Handheld

Item #: 183951929

ZAR 746

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^{*All items will import from US}

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Quickly differentiate between genuine diamonds and common imitations like cubic zirconia or moissanite.

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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

Professional Accuracy

This diamond tester offers exceptional precision, ensuring you can confidently identify real diamonds versus simulants, solving common user concerns about authenticity.

Portable Design

Its handheld and compact design makes it easy to carry and use anywhere, allowing jewelers and enthusiasts to test gems effectively on the go.

Versatile Usage

This tool is ideal for various diamond jewelry, catering to both hobbyists and professionals, offering valuable insight into gem authenticity for diverse user needs.

Product Details

Product Dimensions (L x W x H)	4.33 x 3.54 x 0.78 inches (11 x 9 x 2 cm)
Item model number	goodstumblercu3qdwopg8
Item Weight	2.54 ounces (72.01 grams)
Manufacturer	goodstumbler
Date First Available	October 7, 2025

Who Should Buy?

Jewelry Retailers
Retailers can accurately assess diamond authenticity, enhancing customer trust and improving sales capabilities with this reliable tester.
Gemstone Enthusiasts
Amateur or professional gemstone lovers will appreciate the device's portability and accuracy for personal collections and evaluations.
Jewelry Appraisers
Appraisers need precise tools for evaluating items, and this tester provides essential diagnostic capability for appraising diamonds accurately.

Casual Users
Individuals who casually wear or purchase jewelry may find the device unnecessary and overly technical for their needs.

Product Description

Diamond Tester, Diamond Jewelry Tester, Professional Diamond Selector, Professional Diamond Tester, Diamond Tester Tool Portable Handheld

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Customer Questions & Answers

Question: How to Shop Diamond Tester, Diamond Jewelry Tester, Professional Online From Ubuy?

Answer: It’s easy to shop Diamond Tester, Diamond Jewelry Tester, Professional online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.
Question: Is Diamond Tester, Diamond Jewelry Tester, Professional Available to Shop Online in South Africa?

Answer: Yes, at Ubuy South Africa this product is available for you to shop at a reasonable price. The Diamond Tester, Diamond Jewelry Tester, Professional is not available locally but you can trust us with our express shipping services.
Question: How Long Does It Take to Get Product After Placing the Order?

Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

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Important information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

ZAR 746

Order now and get it around Thursday, August 27

QTY:

Secured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners

Fastest cross-border delivery

Features & Benefits

Quick and accurate diamond authentication with sound alerts and LED colors.
Non-destructive testing ensures no damage to valuable jewelry.
Instant detection of genuine diamonds versus imitations.
Professional-grade thermal technology for reliable gemstone verification.
Portable design ideal for travel and user-friendly operation.
Perfect for both professionals and enthusiasts seeking dependable results.

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns ^*, and secure packaging on every order.

Diamond Tester, Diamond Jewelry Tester, Professional Diamond Selector, Professional Diamond Tester, Diamond Tester Tool Portable Handheld

ZAR 746

Fast Shipping

Free Return*

Secure Packaging

100% Original Products

PCI DSS Compliance

ISO 27001 Certified

What Stands Out

Product Details

Who Should Buy?

Product Description

Customer Questions & Answers

goodstumbler Diamond Testers goodstumblercu3qdwopg8 Editorial Review

Customer Reviews & Ratings

Review this product

Product Price History

Important information

ZAR 746

Features & Benefits

Ubuy Assurance

Fast
Shipping

Free
Return^*