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, Anytime!

POWER THAT LASTS - Runs on 2 AA batteries (not included) for reliable, cordless operation—freedom to test on the go.
LIGHTWEIGHT PORTABLE - At just 490 grams, it’s easy to carry without compromising durability or performance.
PRECISION IN YOUR PALM - Compact design fits effortlessly on your desk or in your toolkit, making gem testing seamless anywhere.
ENGINEERED FOR ACCURACY - Crafted with meticulous precision to deliver trustworthy gem identification every time.
SLEEK PROFESSIONAL AESTHETIC - Modern black finish and streamlined style that complements any professional setting.

The Presidium Gem Tester II PGT is a sleek, compact, and lightweight battery-powered device designed for precise gem identification. Weighing only 490 grams and powered by 2 AA batteries, it offers portability and accuracy in a professional-grade tool tailored for gemologists and jewelry experts.

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Best international shipping I've ever tried. Worth every penny!

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Manufacturer	Presidium
Part number	PGT/CSE
Item Weight	490 g
Product Dimensions	19.81 x 11.43 x 9.65 cm; 490 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

PresidiumGem Tester II PGT

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