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Ade Advanced Optics

Ade Advanced Optics GL500 Gemstone Refractometer with LED Light – Professional Digital Gem Tester for Jewelry, Gemstone, Ruby, Jadeite, Sapphire, Diamond, Moissanite, and Lab Use

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Availability: 13 left in stock
Fulfilled by Amazon
Arrives Saturday, Apr 25
Order within 15 hours and 19 minutes
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Features

  • DURABLE ALL-METAL CONSTRUCTION Built to last with a solid metal body, this gemstone refractometer ensures stability and long-term use for reliable results in professional gem testing and evaluation
  • WIDE MEASUREMENT RANGE Offers a refractive index range of 1.30 to 1.81, covering the values of most commonly tested gemstones. Essential for accurate identification of natural and synthetic stones
  • LED ILLUMINATION WITH BATTERIES INCLUDED Equipped with a built-in LED light source powered by 3 x 1.5V batteries (included), providing consistent lighting for clear readings in any lab or field environment
  • INDUSTRY-STANDARD GEM TESTING TOOL Regarded as one of the most essential instruments in gemology for verifying gem identity. Trusted by jewelers, gemologists, and appraisers worldwide for precise readings
  • COMPLETE TESTING KIT INCLUDED Comes with a polarizing filter for double refraction testing, as well as soft storage pouch to protect the unit and enhance portability during travel or on-site work

Brand: Ade Advanced Optics


Color: Black


Style: hunting


Sport: Hunting


Item Weight: 0.7 Ounces


Material: Aluminum Body with Optic Lens


Magnification Minimum: 3 x


Compatible Devices: Rifle, Shotgun, Handgun


Mounting Type: Integral Mount


Night vision: No


Magnification Minimum: 3 x


Compatible Devices: Rifle, Shotgun, Handgun


Mounting Type: Integral Mount


Night vision: No


Reticle Type: Non-Illuminated


Color: Black


Product Style: hunting


Item Weight: 0.7 Ounces


Material Type: Aluminum Body with Optic Lens


Brand Name: Ade Advanced Optics


Sport Type: Hunting


Manufacturer: Ade Advanced Optics


UPC: 757901788338


Global Trade Identification Number: 38


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Apr 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Decent refractometer!
After getting some duds in this price range, I was pleased to get this refractometer. It gives a good clear reading and feels like a quality instrument. This style is easier for me to use on faceted gems than the more $ GIA model. You need to order the RI fluid separately (expect to spend around $80 for the good stuff). My only complaint is that you better have extra batteries on hand in case you accidently leave the internal light on (there is a side push button), as there is no way to use an external light source. And the directions for the batteries and battery compartment don't match this instrument, but you can easily figure it out. Other than that, this is great quality and value. ... show more
Reviewed in the United States on December 26, 2024 by Karen GH
    • Missing some additions but machine is nice
Review Image by Lily Triscari
It seems that everyone’s experience buying this product is different. Mine came with a hard case but not a soft case and also i didn’t get any RI fluid which is pretty irritating because i can’t use it until i get the fluid. Also the shipping took a long time, and it was delayed on top of that.
Reviewed in the United States on September 30, 2024 by Lily Triscari
    • Not dependable
Measures everything at a 1.6 to 1.66 no matter the stone
Reviewed in the United States on March 27, 2026 by Diana L Williford
    • Great
Works great and is easy to read.
Reviewed in the United States on December 15, 2024 by Jay H.
    • Great product
What I liked about this product is that it feels very high quality it came from the United States. Oregon. It also came with an insightful Direction pamphlet and a refractive index chart thanks you guys
Reviewed in the United States on June 23, 2020 by Evan Saiz
    • Arrived not working.
Arrived in what looked like a good condition, it was packaged well. But the light doesn't work. Will have to return. The body appears to be metal, but the button for the light and inner mechanisms feel like cheap, not well fitting plastic.
Reviewed in the United States on September 24, 2025 by Mark Crafton
    • Nice Refractor For The Price
Let me get a couple of negatives out of the way up front. First, it takes three button style batteries, which are not included... no biggie, but these are not a type of battery I keep on hand or use for anything other equipment. Second, the bottle of refractive oil had seeped out into the case and the cap on the bottle had completely corroded. Thankfully, the refractor itself was enclosed in a zip-lock bag and wasn’t damaged. The description says it comes with both hard and soft cases, but I only received the hard case. The refractor has a nice solid feel, and if taken care of should be very durable. Operation is simple... no learning curve required. We compared the accuracy against a more expensive unit one of my relatives has, and the readings produced by the two units was very close. The refractor itself is a nice little unit for the price, as professional units will cost many times the price of this one... so this is a bargain. ... show more
Reviewed in the United States on November 13, 2023 by Yambobo
    • Refractometer
I like this one. Better than my old one. Works well.
Reviewed in the United States on May 22, 2021 by Katherine Edgett

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