About

Clive Washington

Senior Lecturer, University of Nottingham, U.K.

Articles by


Clive Washington

Gemstone Radiation Treatment

Gemstone radiation is a common but little understood technique for altering gem colors. Learn how it works and what gems usually receive this treatment.…

Lap Testing

An overview on lap testing and the results of test. In an attempt to improve faceting, various laps and polishing combinations were performed and…