---
product_id: 247006042
title: "Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones"
brand: "presidium"
price: "€ 549.21"
currency: EUR
in_stock: true
reviews_count: 13
category: "Presidium"
url: https://www.desertcart.it/products/247006042-presidium-instruments-gem-tester-ii-pgt-ii-now-with-assisted
store_origin: IT
region: Italy
---

# Identifies 16 gemstone types Thinnest retractable probe tip Assisted Thermal Calibration (ATC) Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

**Brand:** presidium
**Price:** € 549.21
**Availability:** ✅ In Stock

## Summary

> 💎 Unlock the secret life of gems with precision and style!

## Quick Answers

- **What is this?** Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones by presidium
- **How much does it cost?** € 549.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/247006042-presidium-instruments-gem-tester-ii-pgt-ii-now-with-assisted)

## Best For

- presidium enthusiasts

## Why This Product

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

## Key Features

- • **Gemstone Mastery:** Effortlessly identifies diamonds, moissanites, and 14 other gemstones
- • **Compact & Durable:** Redesigned for portability without sacrificing ruggedness
- • **Next-Level Calibration:** Assisted Thermal Calibration ensures reliable readings every time
- • **User-Friendly Analog Dial:** Clear, easy-to-read display for quick, confident decisions
- • **Precision at Your Fingertips:** Industry’s thinnest retractable probe tip for pinpoint accuracy

## Overview

The Presidium Instruments Gem Tester II (PGT II) is a compact, battery-powered thermal conductivity tester featuring the industry’s thinnest retractable probe tip and Assisted Thermal Calibration (ATC). It reliably identifies diamonds, moissanites, and 16 common colored gemstones with a clear analog dial, making it a trusted tool for collectors, jewelers, and vintage jewelry enthusiasts seeking accurate, portable gem analysis.

## Description

Buy Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones: Diamond Testers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great unit - This is my second Presidium gem tester. It is easy to use, although sometimes the calibration can be tricky. I have found that if you let the unit warm up for at least an hour, it minimizes the need for re-calibration. I use if for my vintage jewelry hobby.
Review: Must have gem tester for collectors and sellers. - This tester clearly displays hardness of all types of gems in all types of settings. It quickly clears up any mysteries about the gem at hand. Highly recommend!

## Features

- NOTE: The calibration may be affected during shipping. If you have issues, reach out to the seller.
- INDUSTRIES MOST TRUSTED gemstone tester redesigned to be more compact, sturdy and portable.
- THINNEST RETRACTABLE PROBE TIP: PGT II features the industry’s thinnest retractable probe tip.
- VERSATILE AND RELIABLE: Consistent and reliable results every time. Identifies diamonds/moissanites.
- SIMPLE & EASY TO USE: Clear and easy-to-read analog dial; Can differentiate 16 types of gemstones.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08M87J44P |
| Best Sellers Rank | #143,856 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #50 in Jewelry Diamond Testers |
| Brand | Presidium |
| Color | Black |
| Customer Reviews | 4.0 4.0 out of 5 stars (411) |
| Date First Available | November 18, 2020 |
| Item Weight | 1.19 pounds |
| Item dimensions L x W x H | 4.5 x 3.8 x 7.8 inches |
| Item model number | PGT-II |
| Manufacturer | Presidium Instruments |
| Measurement Type | Thermal Conductivity |
| Power Source | Battery Powered |
| Product Dimensions | 4.5 x 3.8 x 7.8 inches |
| Specification Met | Yes |
| Upper Temperature Rating | 27 Degrees Celsius |

## Product Details

- **Brand:** Presidium
- **Color:** Black
- **Item Weight:** 0.54 Kilograms
- **Item dimensions L x W x H:** 4.5 x 3.8 x 7.8 inches
- **Power Source:** Battery Powered

## Images

![Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones - Image 1](https://m.media-amazon.com/images/I/618cIVNZQHL.jpg)

## Questions & Answers

**Q: if $249.00 usa, how much  will it be in canadian money? . then add the s & h. are the s & h usa costs? or will a 15% difference be added ? ty**
A: Look online for conversion tables!

**Q: Product info states device does not distinguish between natural and synthetic. Is that the same as not distinguishing between genuine or imitation?**
A: Yes, and no. Imitation can be like, if they colored a Sapphire to be a Ruby. So, if you buy a Ruby, and it tests Sapphire, it might be Sapphire. You will also want to buy the Presidium Refractometer for a better accuracy (I own both). However, even with both tools, it takes a keen eye, and training to truly know what you're looking at. However, both tools have successfully identified Diamond and Moissanite for me. (Back to the issue at hand). Natural is mined, where as synthetic is lab grown. This generally means that the hardness index will be very similar to the real thing. If you find imitation, it can be anything from a different stone that's been colored, all the way to colored/dyed glass.

**Q: Can i buy extra tips for my presidium i already bought**
A: You can buy new probes for it.

**Q: What is the newest version? And what batteries/adapter**
A: yes both batteries and adapter, this is the newest version

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great unit
*by S***B on August 16, 2021*

This is my second Presidium gem tester. It is easy to use, although sometimes the calibration can be tricky. I have found that if you let the unit warm up for at least an hour, it minimizes the need for re-calibration. I use if for my vintage jewelry hobby.

### ⭐⭐⭐⭐⭐ Must have gem tester for collectors and sellers.
*by M***N on July 24, 2025*

This tester clearly displays hardness of all types of gems in all types of settings. It quickly clears up any mysteries about the gem at hand. Highly recommend!

### ⭐ Broken
*by R***. on November 14, 2025*

I’ve been wanting to get this device. I received today and returning today as it doesn’t calibrate properly.

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-14*