Gubelin Gem Lab

【Ratnapura, S】World’s Largest Sapphire Cluster, Weighing 510 Kg, Discovered in Sri Lanka While Digging a Well, Registered in Guinness Book

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Editor’s NoteThis article reports on the remarkable discovery of a 510-kilogram sapphire cluster in Sri Lanka, unearthed during routine well-digging…

【Switzerland】SSEF and Gubelin Gem Lab Harmonise Standards for ‘Pigeon Blood Red’ and ‘Royal Blue’ Gems

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Editor’s NoteTwo leading Swiss gemological laboratories have established unified standards for the trade terms “pigeon blood red” and “royal blue,”…

【Switzerland】Gubelin Pledges Legacy of Credence and Lifetime of Craft

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Editor’s NoteThis article explores how the Gubelin Group’s 159-year legacy mirrors the qualities of fine gemstones—where meticulous detail, enduring…