Pakistan Gems and Jewellery Development Company (PGJDC) has arranged a training course on Gemstone Identification and Grading at the Gem Exchange, Namak Mandi, in Peshawar on Tuesday. This two-week ...
Pakistan Gems and Jewellery Development Company (PGJDC) has organised a two-week gemstone identification and grading course at its Gems and Jewellery Training and Manufacturing Centre (GJTFMC) in ...
Spectroscopy was first used for studying minerals and gems soon after Isaac Newton attempted to separate sunlight into its component colors with the help of a prism. By the mid-1800s, researchers ...
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