Courses by Gem and Jewellery Research and Training Institute (GJRTI) / Courses in Sri LankaCourses Related to Gem Industry and Jewellery Industry – Gem and Jewellery Research and Training Institute (GJRTI) 2017 August 1, 2017July 7, 2018 Advertisement Published Date – 2017-July-30 Advertisement English Edition Preview Download Advertisement (English Edition) Instructions to Candidates Contact Numbers : 011-2579180, 011-4324676 Email – [email protected] Source – Observereducation.lk Website