---
product_id: 545422694
title: "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"
brand: "jzk"
price: "€ 60.38"
currency: EUR
in_stock: true
url: https://www.desertcart.es/products/545422694-jzk-portable-electronic-diamond-tester-pen-for-diamond-sapphire-ruby
store_origin: ES
region: Spain
---

# Fast, precise hardness test in seconds 9+ lights & beep = real diamond Multi-gem detection: sapphire, ruby, jade & more 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

**Brand:** jzk
**Price:** € 60.38
**Availability:** ✅ In Stock

## Summary

> 💎 Test Like a Pro, Shine Like a Boss!

## Quick Answers

- **What is this?** 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 by jzk
- **How much does it cost?** € 60.38 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/545422694-jzk-portable-electronic-diamond-tester-pen-for-diamond-sapphire-ruby)

## Best For

- jzk enthusiasts

## Why This Product

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

## Key Features

- • **Ergonomic & Portable:** Compact 16x4x2.2 cm design weighing just 100g fits perfectly in your toolkit or pocket.
- • **Diamond-Grade Accuracy:** Confidently verify diamonds with 9+ lights and audible beep—never second guess authenticity again.
- • **User-Friendly Calibration:** Quickly calibrate on glass for flawless readings—perfect for professionals on the go.
- • **All-in-One Gemstone Tester:** Seamlessly test sapphires, rubies, jade, agate, and crystals with calibrated precision in one sleek device.
- • **Instant Results with Visual & Audio Cues:** Lights and beeps guide you through testing, eliminating guesswork and boosting confidence.

## Overview

The JZK Portable Electronic Diamond Tester Pen is a precision tool designed for professionals and enthusiasts to quickly and accurately verify the authenticity of diamonds and multiple precious gemstones including sapphire, ruby, jade, agate, and crystal. Featuring a clear LED light scale and audible beep system, it delivers instant, reliable results. Compact and lightweight, it offers easy calibration and ergonomic handling, making it an essential device for anyone serious about gemstone verification.

## Description

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

## Features

- This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.
- * If the number of lights equals or exceeds 9, and it beeps, it means the diamond is true. * If the lights is about 9 and it beeps, it means the sapphire is true. * If the number is 6.5-7, it means the agate is true. * If the number is 7-8 , it means the crystal is true. * If the number is 6-7, it means the jade is true.
- Before Test: 1. Put the battery in the tester. 2. Take off the probe cap. 3. Turn on the switch. 4. Make sure only one light light up on the scale. 5. Make sure the " ready lamp" light on. 6. (If test diamond, you then need to turn on the lights number corresponding to the indoor temperature and diamond weight.). 7. (If test other gems, you'd better calibrate the probe, method: by placing the probe vertically on a glass, then adjusting the light to 5, then test the gems.)
- ★ NOTICE: * No matter what gemstone you are testing, the probe needle and the tested object must be at a 90° angle. * When testing diamond, your right index finger must keep touching the metal panel on the back of the tester, while you do not touch the panel if you test other gemstones. * Do Not test any metal. * Do Not wear glove.
- Product size: 16 * 4 * 2.2 cm. weight: 100g. Power needed: 1x 9V battery (not included). If you have any problem about the testing, please contact us, we would love to help.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | JZK |
| Brand | JZK |
| Package Dimensions | 31.8 x 23.6 x 3.1 cm; 117.93 g |
| Manufacturer reference | 76166 |
| Manufacturer Part Number | 76166 |
| Item Weight | 118 g |

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/512CcfDiPQL.jpg)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-01-23*