Gemstone testing device

A device for testing a gemstone, the device comprises:

• a housing for blocking external light rays from illuminating the gemstone,
• a platform with an upper surface being provided inside the housing for supporting the gemstone,
• at least one first light source for providing a plurality of first light rays to illuminate the gemstone,
• at least one second light source for producing a plurality of second light rays with a wavelength of about 365 nm for exciting the gemstone to generate a first fluorescence emission,
• at least one third light source for producing a plurality of third light rays with a wavelength of about 222 nm for exciting the gemstone to generate a second fluorescence emission and a phosphorescence emission,
• at least one first light filter for allowing the second light rays with a first predetermined range of wavelengths to excite the gemstone, the first predetermined range extending between about 350 nm and about 380 nm,
• at least one second light filter for allowing the third light rays with a second predetermined range of wavelengths to excite the gemstone, the second predetermined range extending between about 210 nm and about 230 nm,
• a sheet of light absorptive material being provided on the upper surface of the platform for absorbing blue light rays,
• wherein the light absorptive material sheet is provided as a sheet of yellow material and/or a dull white paper, wherein the dull white paper is void of an optical brightening agent (OBA),
• wherein at least one location marking is provided on the light absorptive material sheet,
• a camera module for taking a picture of a fluorescence emission and a picture of a phosphorescence emission of the gemstone, wherein the camera module is embedded in a mobile phone, and
• a display module for displaying the picture and a corresponding reference picture of the gemstone to a user.