The gem torch includes rechargeable battery. Powerful small lightweight torch for examining gem rough in the field. It also includes 365nm UV LED and yellow LED to check minerals and Gems for fluorescence. A handy gemmological tool as for example Ruby (natural and synthetic) fluoresces but Garnet doesn't. Check your Diamonds for fluorescence.
Lamp:365NM+Yellow+White lightPower:1x18650 rechargable lithium battery includedUSB cable includedSize:129mm x 18mm x 23mmNet weight:130gMaterial: Stainless steel bodyFlash modes:UV light-yellow light-white lightBrightness:250lms