DIAMONDPLUS
Electronic devices for screening loose diamonds, comprising two solid-state lasers and two miniature spectrometers, that make a laser-excited photoluminescence measurements on stones immersed in liquid nitrogen, and that detect and screen out graphitization in fractures and halos around internal inclusions and high-pressure, high-temperature (HPHT) treated stones, and parts and fittings therefor, all for use in relation to gems and gemology or for use by gemologists, retail or wholesale jewel...
Registered · March 9, 2010 · 77954402 ·