What is the best presidium model?

I have the colored stone estimator model and like it very well. The duo meter is good for follow-up testing of colored stones,also. The main thing to remember is that you have to make several tests to verify a gemstone properly, such as a refractometer, etc. Presidium is top of the line.

is there one now with a moissanite tester?

Yes that will the presidium duo model we have it available starting at 349

The red light won't stop flashing to indicate the tester is ready for calibration. What can I try to reset it?

As you stated, the Tester is ready for calibration. Please follow the calibration instructions in the little manual or go to the Presidium website. Good Luck!!!

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

Product ID: 7124422

Details

Brand
Presidium
Color
Presidium Gem
Item dimensions L x W x H
7.8 x 4.5 x
Power Source
Battery
Style
Compact

📏Thinnest retractable probe tip

🧪16 gemstone types detected

⚙️Assisted Thermal Calibration (ATC)

B/.952

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

Description

💎 Unlock the secret world of gems with precision and style!

GEMSTONE MASTERY - Easily identifies diamonds, moissanites, and 14 other common colored gemstones.
TRUSTED BY EXPERTS - Compact, sturdy, and portable design—perfect for on-the-go professionals.
CALIBRATE LIKE A PRO - Assisted Thermal Calibration ensures flawless testing in any environment.
USER FRIENDLY ANALOG DIAL - Clear, intuitive readouts make gemstone testing effortless and reliable.
PRECISION AT YOUR FINGERTIPS - Industry’s thinnest retractable probe tip for pinpoint accuracy.

The Presidium Instruments Gem Tester II (PGT II) is a compact, battery-powered device designed for professional and hobbyist gemologists. Featuring Assisted Thermal Calibration (ATC) for easy self-calibration, it reliably identifies diamonds, moissanites, and 16 types of colored gemstones using its industry-leading thin retractable probe tip and clear analog dial. Trusted for its portability and accuracy, the PGT II is a must-have tool for anyone serious about gemstone verification.

Specifications

ASIN	B000TD3G8Q
Best Sellers Rank	#11,115 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #5 in Jewelry Diamond Testers
Brand Name	Presidium
Color	Presidium Gem Tester Complete Unit
Customer Reviews	4.2 4.2 out of 5 stars (1,362)
Item Dimensions	7.8 x 4.5 x 3.8 inches
Item Type Name	PGT II
Manufacturer	Presidium
Measurement Type	Thermoelectric probe
Model	PGT-II
Number of Items	1
Part Number	PGT/CSE
Power Source	Battery Powered
Style Name	Compact
UPC	798804941239 730792705646
Unit Count	1 Count
Upper Temperature Rating	51 °C
Warranty Description	Please contact the seller directly for warranty information for this product. You may also be able to find warranty information on the manufacturer’s website.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

B/.952

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

View all Trustpilot reviews