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!!!

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💎 Test Like a Pro, Anywhere You Go!

SLEEK COMPACT - Designed for easy portability and professional use on the go
TRUSTED BRAND QUALITY - Presidium’s reputation ensures reliable and consistent results
LIGHTWEIGHT EFFICIENCY - At just 499g, it’s perfect for extended use without fatigue
PRECISION IN YOUR PALM - Accurately tests gems with trusted Presidium technology
BATTERY POWERED FREEDOM - Operates on 2 AA batteries for cordless convenience

The PresidiumGem Tester II PGT is a compact, battery-powered gem tester weighing 499g, designed for professionals who demand precision and portability. Powered by 2 AA alkaline batteries (not included), it offers reliable gem identification in a sleek, easy-to-carry form factor from the trusted Presidium brand.

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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.

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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.

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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.

$443

Duties & taxes incl.

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TrustScore 4.5 | 7,300+ reviews

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Very impressed with the quality and fast delivery. Will shop here again.

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Manufacturer	Presidium
Part number	PGT/CSE
Item Weight	499 g
Product Dimensions	19.81 x 11.43 x 9.65 cm; 499 g
Batteries	2 AA batteries required.
Item model number	‎PGT-II
Size	Medium
Color	black
Style	compact
Material	Other
Power source type	Battery Powered
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	Yes
Battery Cell Type	Alkaline

PresidiumGem Tester II PGT

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