Method & apparatus for detecting fracture filled diamonds

Details Method & apparatus for detecting fracture filled diamonds Method & apparatus for detecting fracture filled diamonds

1997-08-28

1998-09-22

Glick, Edward J.

Radiant energy

Invisible radiant energy responsive electric signalling

Ultraviolet light responsive means

250373, 2504611, 356 30, G01N 2187, G01N 2188, G01N 2133

Patent

active

058118179

ABSTRACT:
The detection of fractures in diamonds which are filled with high index of refraction glass is easily and quickly carried out by observation under ultra violet light. Such light having a wavelength between 300 and 400 nm, as reflected from, or transmitted through, such diamonds is imaged using a CCD camera, or directly by the use of fluorescent conversion to the visible spectrum. In either approach, the fracture fills are clearly and immediately distinguishable.

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patent: 5536943 (1996-07-01), Smith et al.
Kammerung, et al., "An Update on Filled Diamonds: Identification and Durability"; Gems & Gemology Fall 1994.
Dumbaugh, "Heavy Metal Oxide Glasses Containing Bi.sub.2 O.sub.3 " vol. 27, No. 3; Jun. 1986 Physics and Chemistry of Glasses.
Chrenko, et al., "Physical Properties of Diamond" (AG.E. Paper); Oct. 1975.

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