The Nitecore GEM8UV is a professional gemstone identifier that has an Ultraviolet light with a 365 nm wavelength and a variable power output between 5 mW and 3000 mW.
There are various models in the GEM series for different stones and the GEM8UV is best used for small gemstone inspection, authenticity identification, fluorescer examination and more. Ideal for identifying small items such as natural Jade without glue-injection which appears transparent under UV, Amber which fluoresces under UV and diamonds which fluoresces blue under UV.
The special design has a better beam focus and the flat top of the GEM8UV allows for close observation without scratching the item.
The rotary switch is turned clockwise until a click is heard and the light come on at the lowest point and the power can be gradually made stronger by continuing to rotate the switch, allowing you to select the best output depending on the size of the gemstone. Turn the switch back anti-clockwise until a click is heard to turn the light off again.
The side of the torch has an integrated measurement scale so you can easily measure the size of the gemstone. The GEM8UV is powered by two CR123A lithium metal non-rechargeable batteries or one 18650 lithium-ion rechargeable battery.
The advanced temperature regulation module allows the GEM8UV to regulate its output and adapt to the ambient environment to maintain optimal performance.
Rotary switch allows infinite brightness
High efficiency constant circuit
Tail stand capability
Advanced temperature regulation
Turbo: 3000 mW; 4 hours, 15 minutes run-time
Ultralow: 5 mW; 500 hours run-time
Please note: Advanced temperature regulation technology allows the GEM8UV to dynamically adjust the output performance according to it's temperature to prevent damaged from over heating. The turbo run-time is tested without the advanced temperature regulation, therefore results may vary between torch, battery and environment.
Tested to ANSI/NEMA FL1 standards in laboratory conditions using 1 x Nitecore 18650 3500 mAh lithium-ion battery.
Important Battery and Battery Charger Information
Primary Cells - Please note that CR123A lithium metal primary battery cells are not rechargeable.
Rechargeable Cells - If you are intending to use lithium-ion rechargeable batteries then you will also need to purchase a suitable battery charger if you do not already have one.
Please click on the Product Accessories tab above to view compatible batteries and battery chargers.
Type: Gemstone inspection LED torch
Operating Modes: UV Turbo-Ultralow
Power Output: 5 mW - 3000 mW
Lamp Type: UV 3 W
Wavelength: 365 nm
Batteries Required: 2 x CR123A lithium metal / 1 x 18650 lithium-ion
Run Time: Up to 500 hours on ultralow
Overall Length: 139 mm
Head Diameter: 9 mm
Barrel Diameter: 21.5 mm
Weight: 57.7 grams
Body Colour: Black
Body Material: Aerograde aluminium alloy
Body Finish: Hard Anodised HAIII military grade finish
Environmental: Water resistant to IPX8 standard (2 m)
Impact Resistance: 1 m
Warranty: 5 years
Regulatory Compliance: CE / RoHS
Packaging and Contents
Supplied in retail packaging and includes:
Nitecore GEM8UV LED light x 1
Lanyard x 1
Holster x 1
Spare O-ring x 2
Manual x 1