Device for judging the quality of precious stones

Details Device for judging the quality of precious stones Device for judging the quality of precious stones

G - Physics

01

N

73/111

G01N 21/87 (2006.01)

Patent

CA 1224062

ABSTRACT OF THE DISCLOSURE A device for judging precious stones such as diamonds with ease, especially enables judgment of quality of cut, clarity or existence of imperfections and color grade of diamonds without requiring expert skill or experience. The device body is provided with a window at its upper part and light source at its lower part. A plate for supporting precious stones such as diamonds, is slidably inserted and carried between the window and the light source. A base plate which is slidably secured, is also provided to the device body, and a magnifying glass for presenting precious stones in enlargement through the window, is fixed to the base plate. On the object lens side of the magnifying glass is mounted a disc having a small hole. The exterior of the disc is colored in red or silver.

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