Grading Lamp for Gemstones

A grading lamp for gemstones comprising:

• a base having an open top with a bottom wall bounded by upstanding front, rear, and side walls, and a lid hinged to the rear wall for swinging between open, intermediate, and closed positions relative to the base, the lid having an upper surface and a lower surface with front and rear flanges, the lid having a lamp recess therein;
• first and second lights positioned in the lamp recess, the first light being a natural daylight, the second light being an ultraviolet light;
• a light diffusing filter positioned over the lamp recess and the first and second lights, the light diffusing filter configured to disperse light from the first and second lights;
• a tray disposed within the open top of the base, the tray including a plurality of depressed cones configured to accept a respective plurality of color reference stones;
• an examination receptacle disposed within the tray, the examination receptacle sized to accept at least a gem under examination;
• the closed position configured to provide reference stone space contact between the lower surface and the tray such that the plurality of color reference stones are held in place within the respective depressed cones within the grading lamp;
• the intermediate position configured to mitigate at the examination receptacle ambient light sourced outside of the grading lamp and to block at the examination receptacle direct overhead light sourced outside of the grading lamp;
• and
• the intermediate position configured to provide at the examination receptacle direct light from the first and second lights.

A grading lamp for gemstones comprising:

• a base having an open top with a bottom wall bounded by upstanding front, rear, and side walls, and a lid hinged to the rear wall for swinging between open, intermediate, and closed positions relative to the base, the lid having un upper surface and a lower surface with front and rear flanges, the lid having a lamp recess therein;
• first and second lights positioned in the lamp recess, the first light being a natural daylight, the second light being an ultraviolet light;
• a light diffusing filter positioned over the lamp recess and the first and second lights, the light diffusing filter configured to disperse light from the first and second lights;
• a tray disposed within the open top of the base, the tray including ten depressed cones configured to accept a respective ten color reference stones corresponding to E, F, G, H, I, J, K, L, M, and N of the Gemological Institute of America (GIA) color reference stones, the tray including a UV-inhibiting composition providing a substantially bright white color;
• a channel interconnecting the ten depressed cones to provide space to facilitate the insertion and removal of the color reference stones from the grading lamp;
• an examination receptacle disposed within the tray, the examination receptacle sized to accept at least a gem under examination and two color reference stones;
• the closed position configured to provide reference stone space contact between the lower surface and the tray such that the plurality of color reference stones are held in place within the respective depressed cones within the grading lamp;
• the intermediate position being from about 25 degrees to about 65 degrees with respect to the base;
• the intermediate position configured to mitigate at the examination receptacle ambient light sourced outside of the grading lamp and to block at the examination receptacle direct overhead light sourced outside of the grading lamp;
• and
• the intermediate position configured to provide at the examination receptacle direct light from the first and second lights.