Apparatus for color analysis of precious stones

Details Apparatus for color analysis of precious stones Apparatus for color analysis of precious stones

1973-07-11

1976-03-16

Smith, Alfred E.

Optics: measuring and testing

Crystal or gem examination

G01N 2100

Patent

active

039443680

ABSTRACT:
A light device for analyzing precious stone body color, comprising a diffused light source in conjunction with indirectly reflected light. Also, method of analyzing precious stones for body color.

REFERENCES:
patent: 1744485 (1930-01-01), Michel et al.

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