Classificação do local: 5 Perth and Kinross, United Kingdom
I should first declare that I am in the jewellery trade in the UK and therefore not used Armstrong Gemmology’s appraisal service, but in the time that I have known Richard(the principal of this business), I have been impressed with his thorough understanding and knowledge of gemmology. I would additionally recommend his e-book on gemstone spectra to all who have a desire to better understand the absorption spectra of gemstones in a gem identification context.