This handbook updates jewellery professionals & serious diamond buyers on the new developments in diamond grading treatments synthetic diamonds fancy-colour diamonds & lab certificates. Using close-up photographs it shows how to make visual judgements about clarity transparency cut quality & brilliance. The handbook also discusses how gem labs are incorporating brightness size scintillation & pattern into their cut grades & it provides tips on detecting treatments & man-made diamonds. Topics include: Quality evaluation; Diamond Recutting; Branded diamonds; Antique cuts & jewellery; Diamond treatments; Fancy-colour diamonds; Synthetic diamonds; Light performance; Fluorescence; Lab reports.