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

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

💎Identifies 16 gemstone types including diamonds/moissanites

📏Industry’s thinnest retractable probe tip for accuracy

🧪Assisted Thermal Calibration for precise self-calibration

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B/.975

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Description

💎 Unlock the secret life of gems—because your collection deserves the best.

GEMSTONE AUTHORITY - Confidently identify diamonds, moissanites, and 14 other common gemstones with reliable thermal conductivity readings.
CALIBRATE LIKE A PRO - Assisted Thermal Calibration lets you tailor accuracy to your environment effortlessly.
PRECISION IN YOUR PALM - Compact, sturdy design with the thinnest retractable probe tip ensures pinpoint testing every time.
USER FRIENDLY ANALOG DIAL - Clear, easy-to-read interface makes gemstone testing straightforward—even for busy professionals on the go.
TRUSTED BY EXPERTS COLLECTORS - Join thousands of gemologists, resellers, and collectors who rely on Presidium’s industry-leading technology.

The Presidium Instruments Gem Tester II (PGT II) is a compact, battery-powered device featuring Assisted Thermal Calibration for precise, environment-specific accuracy. It boasts the industry’s thinnest retractable probe tip and can reliably identify diamonds, moissanites, and 16 types of common colored gemstones via thermal conductivity. Designed for professionals and enthusiasts alike, it offers a clear analog dial for easy use and is trusted across the jewelry and gemology industries.

Specifications

ASIN	B000TD3G8Q
Best Sellers Rank	#11,279 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 (1,329)
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
Part Number	PGT/CSE
Power Source	Battery Powered
Style Name	Compact
UPC	798804941239 730792705646
Unit Count	1.0 Count
Upper Temperature Rating	51 Degrees Celsius
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.

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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.

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B/.975

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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.

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