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Diamond Testers Comparison - May 2025

6 Best Diamond Testers In the UK

1
Best Choice
9.8Exceptional
2
Best Value
9.7Exceptional
3
9.6Exceptional
4
9.5Excellent
5
9.4Excellent
6
9.2Excellent
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Model

JZK Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2
Model
Diamond Tester Pen, High Accuracy Electronic Jewelry Diamond Tester Pen Professional Diamond Detector with 2Pcs 30X 60X Magnifying Glasses Mini Led Foldable Magnifying
Model
ARCELI Diamond Tester Pen-High Accuracy Jewelry Diamond Tester+60X Mini LED Magnifying, Professional Diamond Detector for Novice and Expert, Thermal Conductivity Meter
Model
Diamond Tester Pen, Portable Diamond Selector High Accuracy Electronic Diamond Tester Tool for Jewelry Jade Ruby Stone with 2Pcs 30X 60X Magnifying Glasses Mini Led Foldable Magnifying
Model
Diamond Tester Combo Diamond Detector Moissanite Tester Audible&Visual Alarm Diamond Checker Tool Professional Diamond Moissanite Tester Pen for Diamond Moissanite
Model
QWORK® High Accuracy Diamond Tester Portable Jewelry Gemstone Testing Tool with LED Light and Audio Indicator

Brand

JZK
Brand
CDIYTOOL
Brand
ARCELI
Brand
YWNYT
Brand
DANOPLUS
Brand
QWORK

Reviews

6,405 reviews
Reviews
771 reviews
Reviews
243 reviews
Reviews
183 reviews
Reviews
129 reviews
Reviews
6 reviews

Features

Worth the money

8.6
Worth the money
8.6
Worth the money
7.4
Worth the money
7.0
Worth the money
7.0
Worth the money
7.0

Precision

8.6
Precision
8.6
Precision
7.2
Precision
7.0
Precision
7.0
Precision
7.0

Simple to use

8.6
Simple to use
8.6
Simple to use
7.6
Simple to use
7.9
Simple to use
7.4
Simple to use
7.2

Tech Specs

item weight

90 g
item weight
230 g
item weight
-
item weight
240 g
item weight
177 g
item weight
110 g

customer reviews

4.0 4.0 out of 5 stars 2, 135 ratings 4.0 out of 5 stars
customer reviews
4.1 4.1 out of 5 stars 257 ratings 4.1 out of 5 stars
customer reviews
-
customer reviews
4.0 4.0 out of 5 stars 61 ratings 4.0 out of 5 stars
customer reviews
3.6 3.6 out of 5 stars 43 ratings 3.6 out of 5 stars
customer reviews
5.0 5.0 out of 5 stars 2 ratings 5.0 out of 5 stars

package dimensions

22.6 x 15.6 x 3.2 cm 90 g
package dimensions
20.6 x 12.8 x 3.9 cm 230 g
package dimensions
-
package dimensions
19.5 x 8.6 x 6.6 cm 240 g
package dimensions
-
package dimensions
19 x 6 x 3.2 cm 110 g

batteries included

-
batteries included
No
batteries included
-
batteries included
No
batteries included
-
batteries included
No

manufacturer reference

-
manufacturer reference
S2021122-1
manufacturer reference
-
manufacturer reference
wy8.16-3
manufacturer reference
-
manufacturer reference
-

batteries required

-
batteries required
No
batteries required
-
batteries required
No
batteries required
-
batteries required
No

color

-
color
Black, Jade
color
-
color
black
color
Diamond & Moissanite Tester
color
-

Available On

Available On
Available On
Available On
Available On
Available On

Our Top 3 Picks

Here are the top 3 recommended products with more information to help you find the right product for you
  • 9.8
    1
    JZK

    JZK Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2

    8.6 worth the money
    8.6 Precision
    8.6 Simple to use

    Why we love it

    Tests multiple gemstones including diamonds, sapphires, and rubies.
    Clear results with lights and sound for easy identification.
    Portable and lightweight, ideal for on-the-go testing.
  • 9.7
    2
    CDIYTOOL

    Diamond Tester Pen, High Accuracy Electronic Jewelry Diamond Tester Pen Professional Diamond Detector with 2Pcs 30X 60X Magnifying Glasses Mini Led Foldable Magnifying

    8.6 worth the money
    8.6 Precision
    8.6 Simple to use
    Main highlights
    • Wide Application: Diamond test pen can be used for gems, coins, antiques, stamps, reading, inspection, etc. Diamond tester pen is designed for fast, precise and safe diamond testing.
    • Perfect Combination: the package includes 1 piece of Jewelry tester and 2 piece of Jewelry loupe, which are complete and practical for you to test or observe diamonds, bringing you a good using experience.
    • Magnifying Glass Accessory: 2 pieces magnifying glass are provided, one is equipped with 60X and LED illumination. The other features 2 Lenses(30X 60X) and 2 LED lights. Clear magnification effect, refine surface, comfortable and natural to use. They can be applied for gems, jewelry, coins, stamps, watches, hobbies, models and observing other items you want.
    • Dual Function: The diamond tester can test the authenticity of diamonds(above 9), and can also test the hardness of finished jade crystal agate with a hardness value between 5-9.
    • Clear Screen & Audio Instruction Design: these high accuracy diamond testers are designed with a clear screen, so you can get the useful data quickly. The jewelry diamond tester is equipped with LED lights and audio instructions. As long as the tip is perpendicular to the test masonry and the switch is pressed, the result can be obtained.
  • 9.6
    3
    ARCELI

    ARCELI Diamond Tester Pen-High Accuracy Jewelry Diamond Tester+60X Mini LED Magnifying, Professional Diamond Detector for Novice and Expert, Thermal Conductivity Meter

    7.6 Simple to use
    7.4 worth the money
    7.2 Precision
    Main highlights
    • 【Package Includes】1 x diamond tester, 1 x 60X Mini LED Magnifying,1 x user manual. This diamond tester uses DC9V battery (NOT included).
    • 【High Accuracy Diamond Tester】This diamond tester is designed for fast, accurate and safe diamond testing, not harmful to diamonds.
    • 【Easy to Use】Real Diamond will Emits sounds and lights >=9. Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9.
    • 【Aftersales】Please read the instructions and detailed description before use. If you have any problem about the diamond tester pen, please feel free to contact us!
    • 【60X LED Magnification】60x led magnification with battery, suitable for gemstones, coins, antiques, stamps, reading, inspection, etc.

Our ranking system

The TopChoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria.We can ensure that the product is well-tested with the help of our expertise, experts, and artificial intelligence technology. TopChoice.co.uk requires consistent care for the products we review, ensuring that our assessments are always accurate and up to date.

Features

Our team of experts analyzes key attributes, capabilities, significance, and many more depending on the type of product to determine its effectiveness.
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Consumer Reviews

We ensure an evaluation of the ratings using references all over the internet for each product. With the help of our AI technology and professional review teams, we give weight to the worth of individual user experiences.
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Popularity

Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.
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Value for money

TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.

When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.

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