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You don't accept credit cards from my country
Shipping & Returns
When will my item be shipped?
Can my order be marked as a gift to avoid customs taxes/duties?
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I haven't received my tracking number
Do you accept returns from customers outside of the United States?
Manufacturers & Warranty
Obtaining warranty service for your product
Contact Reliable Corporation
Contact Sy Kessler (GemOro)
Contact Tri Electronics
Gold, Platinum and Silver Testers
Tri Electronics G-24 Gold Tester keeps switching modes
Can I use any AC adapter with my Tri Electronics Gold Tester?
Tri-Electronics GXL-24 Pro and M24 Brief Comparison
Do I need an AC adapter for the Tri Electronics GXL-24 Gold Tester?
There is gel behind my Tri Electronics refill's plunger
See all 22 articles
Diamond and Moissanite Testers
Can a diamond tester recognize artificial (man made, lab created) diamonds?
Do electronic diamond testers need testing liquid?
GemOro UltraTester II & Pro-D Troubleshooting
When should I use a moissanite tester?
Is a diamond moissanite tester better than two separate testers?
See all 10 articles
I can't find the probe cap for my Presidium PGT/PDT Tester
Where is the simulant kit for the Presidium PDT Tester?
Can a gem tester recognize artificial (man made, lab created) stones?
How are Presidium PDT Testers advantageous?
What's the difference between the Presidium PDT & PDT-S7?
See all 7 articles
I need a refractive index/reflectivity chart
Do the Presidium PRM/PRIM II require liquid or oil to operate?
How do the Presidium PRM/PRIM II handle doubly refractive stones?
My refractometer's manual describes a calibration block
Can a refractometer be used on mounted stones?
See all 6 articles
Are there any dual ultrasonic/steam cleaners?
Do ultrasonic cleaners need any specific liquid/solution?
What is "legal for trade"?
Do I need a carat scale or a gram scale?
My 2000g scale's display keeps flashing 2000
Why does my scale show "The counting feature is not legal for trade"?
Ohaus PAJ NTEP Certificate of Conformance
What unique features does the Presidium PGCG have?
Gold Tester: Tri Electronics GXL-18 Manual
Tri Electronics G-24 Gold Tester Manual
Gold Tester: Tri Electronics GT-4000 Manual
Gold Tester: Tri Electronics GT-3000 Manual
Gold Tester: RS Mizar ET-18 Manual
See all 22 articles
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