Emmanuel Piat

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retail luxury goods & jewelry natural gems gem faceting lapidary art coloured gemstones gem analysis precious gemstones gemstone research cutting techniques customized training gemstone trade sapphire ruby emerald aquamarine tourmaline garnet spinel topaz tanzanite peridot gemstone inclusions ethical sourcing gem certification gemological association cutting processes gemstone quality gemstone grading refractive index specific gravity mohs hardness bespoke training gemstone markets jewellery design lapidary workshops colour grading gemstone applications gems supply chain gemstone ethics gem forging techniques innovation in gemstones creative gemstone designs gem market trends gemstone procurement facet cutting gemstone recovery gemstone brokerage gemstone enhancement precious stone cutting