Switzerland’s SSEF and Gübelin Gem Lab Agree to Harmonize Two Color Standards

05/11/2015 23:35

The Swiss-based Gübelin Gem Lab and Swiss Gemmological Institute SSEF have agreed to harmonize their standards for the color terms “pigeon blood red” and “royal blue.” Their goal is to standardize the usage of these terms for the benefit of the international gemstone trade. The terms have become increasingly popular in recent years as some labs use them in their marketing of grading reports, but agreement on the precise colors has been difficult to achieve since they are considered to be highly subjective.