Courses by Gem and Jewellery Research and Training Institute (GJRTI) / Courses in Sri LankaNVQ Courses 2022 – Gem and Jewellery Research and Training Institute January 31, 2022February 1, 2022 Apply Now ! Here you can see the English Advertisement… ad-en-20220130-7 English AdvertisementDownloadOnline ApplicationApply OnlineSource – Sunday observer (2022.01.30)