Fancy these: inside the diamond color rainbow

摘要

Thousands of gemologists around the world earn their living by grading colorless diamonds. But it is doubtful that there are more than a few dozen who are paid in whole or part to grade colored diamonds. This has far less to do with the rarity of fancy-color diamonds relative to colorless ones than with the difficulty of grading such stones. Colorless or near colorless stones have a relatively straightforward grading system, developed by GIA 56 years ago.