‘pigeon blood red’ and ‘royal blue’ standards

Switzerland’s SSEF and Gübelin Gem Lab agree to harmonise ‘pigeon blood red’ and ‘royal blue’ standards

The Swiss-based Gübelin Gem Lab and Swiss Gemmological Institute SSEF, recognised as the leading laboratories for coloured stone testing, have agreed to harmonise their standards for the colour terms “pigeon blood red” and “royal blue.” Their goal is to standardise the usage of these terms for the benefit of the international gemstone trade.

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