---
product_id: 336076645
title: "Presidium Gem Indicator PGI Colored Gemstone and Diamond Tester"
brand: "presidium"
price: "C$50400"
currency: NIO
in_stock: true
reviews_count: 5
category: "Presidium"
url: https://www.desertcart.ni/products/336076645-presidium-gem-indicator-pgi-colored-gemstone-and-diamond-tester
store_origin: NI
region: Nicaragua
---

# Tests 31 gem types 0.45mm ultra-thin probe tip Low battery & buzzer alerts Presidium Gem Indicator PGI Colored Gemstone and Diamond Tester

**Brand:** presidium
**Price:** C$50400
**Availability:** ✅ In Stock

## Summary

> 💎 Unlock the true value of every gem with pinpoint precision!

## Quick Answers

- **What is this?** Presidium Gem Indicator PGI Colored Gemstone and Diamond Tester by presidium
- **How much does it cost?** C$50400 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/336076645-presidium-gem-indicator-pgi-colored-gemstone-and-diamond-tester)

## 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

- • **Smart Color Input:** Select from 12 common gem colors for enhanced testing accuracy
- • **Versatile Gem Detection:** Accurately tests diamonds plus 31 colored gemstones with thermal conductivity tech
- • **Precision at Your Fingertips:** Industry’s thinnest 0.45mm probe tip for gems as small as 0.2ct
- • **User-Friendly Digital Display:** Clear OLED screen shows amplified thermal readings instantly
- • **Seamless Connectivity & Alerts:** USB PC connection, metal buzzer alerts, and low battery indicator keep you ahead

## Overview

The Presidium Gem Indicator PGI is a handheld digital tester designed specifically for colored gemstones and diamonds. Featuring the industry's thinnest 0.45mm probe tip, it accurately tests gems as small as 0.2 carats across 31 types using advanced thermal conductivity technology. Its color input function and clear OLED display ensure precise readings, while USB connectivity and buzzer alerts enhance usability for professionals seeking reliable, on-the-go gem verification.

## Description

This gem indicator is the only hand-held tester in the industry specifically for colored gemstones. It indicates diamonds and up to 31 different types of colored gems based on their thermal conductivity and even features a color input function that allows users to select from a range of 12 common colors, thereby achieving more accurate results. The indicator probe consists of two linked thermometers; One which is heated electronically, while the other is cooled by the gemstone being tested. The difference in temperature creates an electrical output, which is then amplified and displayed on the new easy-to-read clear digital organic LED display screen. Industry's thinnest probe tip (0.45mm) for testing gemstones from 0.2ct Retractable thermoelectric tip that maintains constant pressure against gemstone Patented refined changeable probe tip which ensures minimal equipment downtime Metal buzzer alert and low battery indicator USB connection to PC for more value-added functions

Review: Falto el instructivo y caja vino dañada tratare de bajar el manual de internet , medio difícil de utilizar
Review: Excellent Seller! Purchase a Presidium gemstone tester! I love it! Thank you!

## Features

- Handheld digital tester
- Tests up to 31 different types of colored gemstones
- Industry's thinnest probe tip (0.45mm) for testing gemstones from 0.2ct

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06X979666 |
| Best Sellers Rank | 555,951 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,768 in Multi Testers |
| Brand | Presidium |
| Customer Reviews | 3.8 3.8 out of 5 stars (54) |
| Date First Available | 3 Jun. 2016 |
| Item Weight | 318 g |
| Manufacturer | Presidium |
| Manufacturer Part Number | PGI |
| Model Number | PGI |
| Package Dimensions | 20.57 x 8.64 x 6.1 cm; 318 g |

## Images

![Presidium Gem Indicator PGI Colored Gemstone and Diamond Tester - Image 1](https://m.media-amazon.com/images/I/71SIZ1xbSgL.jpg)

## Questions & Answers

**Q: how does it identify the gemstones as i see nowhere it will show anything in the above photo**
A: You would place the probe tip against the stone you are testing, select the color of the stone in the window, and the tester will identify what it is. The screen is small, but all the information you need will be there

**Q: Where can I find a list of the 31 gemstone this item can detect?**
A: Glass, Iolite, Almandine, Pyrope, Spessartite, Aquamarine, Emerald, Goshenite, Helidor, Morganite, Tanzanite, Nephrite, Peridot, Jadeite, Paraiba, Rubellite, Tourmaline, Demantoid, Hessonite, Tsavorite, Chrysoprase, Amethyst, Aventurine, Citrine, Quartz, Spinel, Chrysoberyl, Topaz, Ruby, Sapphire, Diamond

**Q: Can you test mounted stones?**
A: You can test all kinds of stones! Loose, mounted, cracked, clear and even cloudy!!!

**Q: Can it tell the difference between genuine diamonds and synthetic diamonds ?**
A: Hello,

No, it can not. It simply identifies the stones

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by A***O on 8 September 2023*

Falto el instructivo y caja vino dañada tratare de bajar el manual de internet , medio difícil de utilizar

### ⭐⭐⭐⭐⭐ Review
*by L***. on 13 January 2026*

Excellent Seller! Purchase a Presidium gemstone tester! I love it! Thank you!

### ⭐⭐⭐⭐ Review
*by S***N on 6 February 2024*

Keep the operating procedure simple to follow/understand. Can you share a detailed and simple procedure to start using including how to test different colored gemstones?

## Frequently Bought Together

- Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones
- Professional Gold, Silver, Platinum Jewelry Testing Kit with Stone Instructions and Box with 30X Eye Loupe Magnifier Precious Metals 10K 14K 18K 24K 999 925 Scrap
- Presidium Replacement Probe Pen PS2-2 for Presidium Gem Tester II (PGT II) and Duo Tester II (PDT II)

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**Shop now:** [https://www.desertcart.ni/products/336076645-presidium-gem-indicator-pgi-colored-gemstone-and-diamond-tester](https://www.desertcart.ni/products/336076645-presidium-gem-indicator-pgi-colored-gemstone-and-diamond-tester)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-03-04*