HQRP 365nm 9 LED Portable Blacklight Flashlight for Express Checking Diamonds and Brilliants

Currently stones that look similar to dimonds (including synthetic) are widely used. They are called "imitation" and not a fake. The following stones are commonly used to imitate diamonds: 1. Natural stones , such as zircon, white sapphire, topaz, rock crystal; 2. Artificial stones , such as moissanite, titanite, stabilized zircon, lithium niobate, and others. Gemologists verify the luminescence of diamonds under UV light with a wavelength of 365 nm, rarely with a wavelength of 294nm . If the stone is illuminated with visible light, i.e. it luminesces, the color and light intensity is assessed by eye. The nature of luminescence in a diamond is a variety of optically active centers, mainly impurities at the atomic level. The most common center consisting of three nitrogen atoms and one vacancy, gives a blue luminescence, which is most common in diamonds. But it is considered that the color and intensity of the glow could be anything, and in rare cases it is phosphorescence, i.e. the stone glows in the dark even after the UV lamp turned off. The method of express diagnosis of diamonds is based on this phenomenon, especially if there're many diamonds in the product. The product is looked at under a UV lamp, the phianites are all inert while the diamonds light under the ultraviolet in different colors and with different intensity. However, this method is not 100 % relliable as for example, zircon can luminesce in UV rays as well. Diamonds have individual glow in the ultraviolet which is different for each stone. But imitations always light in the same way. HQRP® UV flashlight will help you to expesss-check diamonds at home or at the time of purchase!WARNING for California residents pursuant to CA Proposition 65: This product may expose you to chemicals known to the State of California to cause: WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov Disclaimer:This is not an original OEM product, HQRP branded product is a replacement. All brand names and logos are registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purposes of demonstrating compatibility. More Information brand HQRP upc 887774374502

• HQRP® 365 nM LED Flashlight;
• LEDs: 9, Wavelength: 365-370 nanometer; Powered by 3 x AAA batteries (not included);
• Aluminium Body, Water Resistance, Light on By on/off Switch;
• 200 days Warranty!