According to Rapaport, the price of 1-carat diamonds slid by 1% year-to-date and the price of 3-carat diamonds fell by 6.1% year-to-date.
Rapaport Group Mining News
Rapaport says the model should guarantee that government diamond revenue provides vital infrastructure to the communities where the diamonds are found.
1-carat stones fell by 0.4% last month and 1.8% compared to January 2018.
Rapaport says that following a better-than-expected holiday season, polished diamond prices stabilized in December 2017.