---
product_id: 386129512
title: "Gem Indicator (PGI) Gem Tester"
brand: "presidium"
price: "NT$24366"
currency: TWD
in_stock: true
url: https://www.desertcart.tw/products/386129512-gem-indicator-pgi-gem-tester
store_origin: TW
region: Taiwan
---

# Tests 31 gemstone types with color input Thinnest retractable probe tip for precision USB-powered for on-the-go convenience Gem Indicator (PGI) Gem Tester

**Brand:** presidium
**Price:** NT$24366
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Gem Indicator (PGI) Gem Tester by presidium
- **How much does it cost?** NT$24366 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/386129512-gem-indicator-pgi-gem-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

- • **Gemstone Mastery:** Identify 31 different gemstones with enhanced color input for crystal-clear differentiation.
- • **Ergonomic Elegance:** Chrome-brushed grip designed for comfort during extended use—style meets function.
- • **Power Your Passion Anywhere:** USB port offers flexible power options, perfect for professionals on the move.
- • **Precision at Your Fingertips:** Ultra-thin retractable probe ensures flawless contact and unmatched accuracy.
- • **Readability Meets Efficiency:** Bright digital LED screen delivers instant, easy-to-interpret results every time.

## Overview

The Presidium Gem Indicator (PGI) is a lightweight, ergonomic gem tester featuring the thinnest retractable thermoelectric probe tip for superior accuracy. It supports testing of 31 different gemstones with a color input function for enhanced differentiation, displays results on a clear digital LED screen, and offers USB power for versatile, portable use.

## Description

Gem Indicator (PGI) Gem Tester

## Features

- MUST READ INSTRUCTIONS BEFORE USING | Presidium is available for any troubleshooting assistance
- THINNEST RETRACTABLE PROBE TIP | Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone, for enhanced accuracy.
- VERSATILE AND RELIABLE | Color input function to further separate gemstones for more precise results.
- EASY TO READ | Results are on a clear digital LED screen; Tests an extended range of 31 different gemstones.
- ERGONOMIC | Sleek chrome-brushed ergonomic grip; USB port for alternative power and handheld for convenience.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Presidium |
| Model Number | PGI |
| Package Dimensions | 21.69 x 14.1 x 6.3 cm; 200 g |
| Material | stone |
| Item Weight | 200 g |

## Images

![Gem Indicator (PGI) Gem Tester - Image 1](https://m.media-amazon.com/images/I/71SIZ1xbSgL.jpg)
![Gem Indicator (PGI) Gem Tester - Image 2](https://m.media-amazon.com/images/I/61NiCiPqSeL.jpg)
![Gem Indicator (PGI) Gem Tester - Image 3](https://m.media-amazon.com/images/I/61xYoL8m17L.jpg)
![Gem Indicator (PGI) Gem Tester - Image 4](https://m.media-amazon.com/images/I/61JEvo5ky6L.jpg)
![Gem Indicator (PGI) Gem Tester - Image 5](https://m.media-amazon.com/images/I/61rgbr2vW1L.jpg)

## Questions & Answers

**Q: What is included in purchase? What replacement tip does this device use? Same a Adamus?**
A: This with the tip installed, carrying pouch, and Aluminum Plate.

**Q: Can it determine Moissanites from Diamonds?**
A: No this unit will detect moissanite as a diamond

**Q: How does it display a ruby?  How does it display an emerald?**
A: It’s not accurate at all...
It’s working not efficiently

**Q: How does it display the identity the gemstones?**
A: You pick the color of the gem stone and then it will give you multiple choices as to what it may be. You will need some basic gemstone knowledge to make this useful.

## Frequently Bought Together

- Gem Indicator (PGI) Gem Tester
- 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
- Euro Tool Ez Sizer, Bracelet Mandrel, Travel Size | GAU-110.10

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**Shop now:** [https://www.desertcart.tw/products/386129512-gem-indicator-pgi-gem-tester](https://www.desertcart.tw/products/386129512-gem-indicator-pgi-gem-tester)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-04-23*