---
product_id: 42075573
title: "Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)"
brand: "hqdz"
price: "4634 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Hqdz"
url: https://www.desertcart.is/products/42075573-diamond-tester-high-accuracy-jewelry-diamond-tester-professional-diamond-tester
store_origin: IS
region: Iceland
---

# 9V battery powered - instant readiness Compact 3.94x1.57x1.18 in - ergonomic handheld Audible beep & LED indicators - clear, fast results Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)

**Brand:** hqdz
**Price:** 4634 kr
**Availability:** ✅ In Stock

## Summary

> 💎 Test Like a Pro, Spot the Real Glow!

## Quick Answers

- **What is this?** Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) by hqdz
- **How much does it cost?** 4634 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/42075573-diamond-tester-high-accuracy-jewelry-diamond-tester-professional-diamond-tester)

## Best For

- hqdz enthusiasts

## Why This Product

- Trusted hqdz brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Intuitive Bare-Hand Operation:** No gloves needed—simply hold the tester and gemstone with bare hands for flawless, foolproof readings every time.
- • **All-Inclusive Professional Kit:** Comes complete with 9V battery, leather pouch, testing platform, and manual—everything you need to test like a pro.
- • **Instant Audible & Visual Feedback:** Get immediate confirmation with beeps and LED lights, eliminating guesswork and saving you valuable time.
- • **Optimized for Everyday Conditions:** Designed to perform reliably within 10-35°C and low humidity, ensuring consistent results wherever you are.
- • **Precision Thermal Conductivity Testing:** Distinguish real diamonds from fakes with professional-grade accuracy using advanced thermal conductivity technology.

## Overview

The Hqdz Diamond Tester Pen is a compact, battery-powered device that uses thermal conductivity to accurately identify genuine diamonds. Featuring clear LED and audible indicators, it requires bare-hand operation for precise readings and includes a full professional kit with a 9V battery, leather pouch, and testing platform. Ideal for novices and experts alike, it delivers fast, reliable results within standard temperature and humidity ranges.

## Description

Buy Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers): Diamond Testers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great for figuring out diamond jewelry - Works really well at detecting real diamonds from fake diamonds which makes it a great value for the money and very easy to use and it's very accurate and is a size that most hands can hold
Review: Wonderfully simple - Inherited some jewelry and not sure if precious gems or not. Tested gave me the answers and saved me the expense and trouble of going to a jeweler

## Features

- [Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily differentiate the readings.
- [Bare Hands Operation]:All the tests must be done by your bare hands. If you put on your gloves, the metal alert will not function since a normal moisture levelof your hands is necessary for operation.All test must be done by TWO hands, one for hold the diamond and one for the diamond tester. As for the hand which hold diamond tester, you have to touch the electricity conductive panel on the back of the unit.If you test the diamond just by one hand, you will get a wrong result.
- [Beeping Upon Startup]:Ensure correct installation and adequate power in the test pen battery. Also, clean the test pen probe as maintaining its cleanliness can enhance testing efficacy.A beeping sound upon powering on signifies the need for initialization settings. Consult the table on the rear of the machine for the specific initialization settings considering the diamond's temperature and size. Adjust the initial number of illuminated lights by rotating the knob (the default setting is to have 4 lights illuminated at room temperature).
- [High-Frequency Sound when Testing Metal]:The high-frequency sound during metal testing is due to the test pen's operational principle, which relies on thermal conductivity to distinguish between diamonds and fake gemstones. Since metal possesses thermal conductivity similar to diamonds, it generates a high-frequency sound during testing.
- [Simple to Use]:Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep.
- [ Note]: The battery temperature is lower than 10 degrees Celsius, which seriously affects the use time Don't wear gloves，Don't detect metal Best to measure in no wind conditions，The operating temperature is within the range of 10-35 degrees Celsius, and the humidity is below 80% When testing diamond, your right index finger must keep touching the metal panel on the back of the tester. Please turn off the power after the test to save power.
- [Package include]:Diamond tester is battery powered for convenience.Requires 1 standard 9v battery, which is included.Package include:1 x Diamond Tester,1 x Leather Pouch Case,1 x Testing Platform,1 x User Manual,1 x DC 9V battery.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06Y2MT175 |
| Batteries | 1 A batteries required. (included) |
| Best Sellers Rank | #1,867 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #2 in Jewelry Diamond Testers |
| Brand | Hqdz |
| Color | Black |
| Date First Available | April 5, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.3 ounces |
| Item dimensions L x W x H | 3.94 x 1.57 x 1.18 inches |
| Item model number | Hqdz |
| Lower Temperature Rating | 10 Degrees Celsius |
| Manufacturer | Hqdz |
| Measurement Type | Thermal Conductivity |
| Min. Operating Voltage | 9 Volts |
| Power Source | Battery Powered |
| Product Dimensions | 3.94 x 1.57 x 1.18 inches |
| Style | 1.High Quality Accuracy Ease of use 2.Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones 3. Professional Diamond Selector for Novice and Expert&Jewelers,Thermal Conductivity Meter 4.Gems, Jewelry, Diamonds, jewelry appraisal, gemstones, rocks,watches, |
| UPC | 612957119690 |
| Upper Temperature Rating | 35 Degrees Celsius |

## Product Details

- **Brand:** Hqdz
- **Color:** Black
- **Item Weight:** 0.33 Pounds
- **Power Source:** Battery Powered

## Images

![Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) - Image 1](https://m.media-amazon.com/images/I/71ClMjTPJFL.jpg)

## Questions & Answers

**Q: What is the small black thing inside the package that is shaped like the capital letter E**
A: Mine came with a thing to hold loose diamonds...is this what you’re talking about?

**Q: Does this unit test uncut stones?**
A: How To Test Diamond
Turn on the switch.
Make sure only 1 light is lighting up on the scale.
Wait few seconds for the probe to heat up until Lamp on ready OK.
Turn on the lights numbers corresponding to the indoor temperature and diamond weight.
If don't know. Set 4 lights is lighting up on the scale.
Start test diamond, no need to adjust the switch switch.
Use the diamond discriminator probe to make 90-degree contact with the measured object, and observe the indicator light change.
It needs a little bit of force to stop it on the diamond surface and make full contact.
If unsuccessful, please repeat the second step.

Hqdz Diamond Tester Pen
Test result analysis
If lights >= 9 and have sounds, it is true diamond.
If lights < 9 and no sounds, it is not diamond.
If lights is 7 or 8, it is true crystal.
If lights is 6 or 7, it is true jade.
If lights is 4 or 5, it is glass.
Don't test metal，Don't wear gloves.
In a low temperature environment, the battery discharge is weakened. Please raise the battery temperature to above 10 degrees Celsius.
The test takes a few minutes, please turn off the power after the test is complete.

**Q: Why does it go to red and beep on a chain  I believe it’s gold . It’s the same beep noise as it sounds with a diamond. Not the weird sound on metal**
A: How To Test Diamond
Turn on the switch.
Make sure only 1 light is lighting up on the scale.
Wait few seconds for the probe to heat up until Lamp on ready OK.
Turn on the lights numbers corresponding to the indoor temperature and diamond weight.
If don't know. Set 4 lights is lighting up on the scale.
Start test diamond, no need to adjust the switch switch.
Use the diamond discriminator probe to make 90-degree contact with the measured object, and observe the indicator light change.
It needs a little bit of force to stop it on the diamond surface and make full contact.
If unsuccessful, please repeat the second step.

Hqdz Diamond Tester Pen
Test result analysis
If lights >= 9 and have sounds, it is true diamond.
If lights < 9 and no sounds, it is not diamond.
If lights is 7 or 8, it is true crystal.
If lights is 6 or 7, it is true jade.
If lights is 4 or 5, it is glass.
Don't test metal，Don't wear gloves.
In a low temperature environment, the battery discharge is weakened. Please raise the battery temperature to above 10 degrees Celsius.
The test takes a few minutes, please turn off the power after the test is complete.

**Q: Will it beep for lab grown diamond?**
A: it should but if it doesn't beep then take it to a jeweler to have them check it out. plus you can go online and see

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for figuring out diamond jewelry
*by V***D on October 26, 2025*

Works really well at detecting real diamonds from fake diamonds which makes it a great value for the money and very easy to use and it's very accurate and is a size that most hands can hold

### ⭐⭐⭐⭐⭐ Wonderfully simple
*by M***N on February 9, 2026*

Inherited some jewelry and not sure if precious gems or not. Tested gave me the answers and saved me the expense and trouble of going to a jeweler

### ⭐⭐⭐⭐ Works Great But Came With Dead Battery
*by S***E on March 22, 2021*

It took a bit of trial and error and re-reading the detailed instructions to get it to work. But once we figured it out, it's very easy to use. The one main complaint is a minor one: the battery that came with the Diamond Tester died after just a few minutes of use. Fortunately, it's a common battery (9V) and we have spares, so we were able to get it up and running again. Despite the challenges, it seems to work well and is reasonably priced.

## Frequently Bought Together

- High Accuracy Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black)
- Envistia Mall Keychain Magnet for Testing Gold, Silver, Brass, Precious Metal & Jewelry, Non-ferrous metal verification

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-26*