Switzerland is an attractive place to work and the country needs specialists. Why Switzerland needs workers from abroad “There are end-consumers who are interested in the beauty of coloured gems, but they hesitate in buying them because they are difficult to understand, and so they move to diamonds,” he says. Gübelin hopes that the new rating system will boost consumer confidence. These specimens are parsed by the Gübelin Gemtelligence, an ongoing project which develops a machine learning-based algorithm to enhance consistency in assessing gems. Work on designing the rating system started in 2018 and it was built on a database compiled over decades recording more than 28,000 gems of proven origin. “I wanted something simple, a single number that would encompass the quality of the stone and its rarity and immediately give a comprehensive idea of the stone,” explains chief executive Raphael Gübelin. The new parameters are modelled after Robert Parker’s wine rating system that, since the late 1970s, has judged wines from across the globe on the basis of a 100-point scale. However, the new Gübelin Gemstone Rating will now assess the quality, rarity and salience of a specific gemstone by attributing to it a number - Gübelin Points. They do not, however, provide any indication about the quality of the stone itself. Its traditional reports, costing upwards of CHF200 ($216), will identify a coloured gem, its country of origin where possible, and the presence of any treatment such as heating or oiling. Its Gübelin Gem Lab opened in the 1920s to appraise stones and the Swiss house has become a renowned authority on coloured gems.
For many years, dealers and jewellers have racked their brains to produce an evaluation model for these big three coloured gems that could be easily understandable and widely adopted.Īnd, when the 2020 pandemic forced remote trading through virtual inspection on digital screens, the need for a solution escalated - just the perfect timing for the Gübelin Gem Lab to introduce their new rating system for coloured gemstones.Īlthough Gübelin started in Lucerne as a watchmaker, the business subsequently moved into jewellery.
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